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The implementation of municipal master plans and the on-going evaluation process

Oliveira & Pinho 1

The implementation of municipal master plans and the on-

going evaluation process

Vtor Oliveira & Paulo PinhoCITTA Research Centre for Territory, Transports and Environment

Faculty of Engineering, University of Oporto, [email protected]&[email protected]

Phone/fax numbers: 351 22 508 19 03 - 351 22 508 14 86

Abstract

The structure, form and functionsof our cities are the result of planned and spontaneous developments. In this

paper the authors argue that a deeper understanding of the physical aspects of planning could be achieved

through new forms of dialog with related scientific fields. A triangle built around three main subjects, Planning,

Evaluation and Urban Morphology will be the focus of the debate. A number of specific contributions are

selected from the overview of these three scientific fields. This overview supports the methodological proposalto evaluate urban planning practice. Based on previous work on the planning practice in the cities of Lisbon and

Oporto, the authors establish the terms and conditions to apply this methodology.

Keywords: Local planning; evaluation; urban morphology; planning methods

Introduction

In this paper the authors argue that a deeper understanding of the physical aspects of planning could be achieved

through new forms of dialog with related scientific fields, namely urban morphology and evaluation.

Planning the different and complex dimensions of the urban phenomena have been suffering, in recent decades,important changes. One of the most significant changes has surely to do with our new perception of the role of

land-use plans, somehow devaluated as planning products intended to control the physical form of a city, in

comparison to the increasing importance placed on the plan-making process, as part of a wider planning process,

closely related to decision making, the emergence of new planning discourses and of the community planning

paradigm. And yet, the planning debate that characterizes the first years of the XXI century have not neglected

the role of the physical form of our cities with the rise of urban design as an increasingly important topic of

planning practice and research.

In the urban morphology field, in particular, the emergence of an interesting interdisciplinary platform is

identified. On this platform seem to converge three European schools the British, the Italian and the French

that have been studying, separately and since the early 1950s, different aspects of urban form approached from

different disciplinary perspectives.

Evaluation is the third scientific field brought to discussion in this paper. The inadequate or insufficient

integration of evaluation methodologies in the planning process, the steady evolution of our perception of therole of evaluation in the planning process from a rational towards a constructivist paradigm, the progress so far

achieved in the development of evaluation methodologies from the classical Cost-Benefit Analysis to the widely

used Environmental Assessment, and the nature and extent of the relationships between theory and practice ofevaluation in planning, are some of the topics touched upon in this paper.

The methodological proposal is designed around the following topics selected from this overview: i) the

particular features of the implementation process of local plans, ii) the characteristics of the so-called on-going

evaluation carried out by the planning team throughout the implementation process of local plans, and iii) the

nature of planning controls over the morphological aspects of development projects most likely to influence the

quality of urban life. The proposal is expected to contribute to an overall improvement of the performance oflocal plans, striking a balance between rigid legal requirements and environmental quality conditions and the

necessary flexibility of planning proposals. In particular, the role of on-going evaluation is stressed taking

advantage of unforeseen development opportunities, or identifying the adequate timing to introduce more detail

in urban design guidance, whenever uncertainty is perceived to be under control.


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Theoretical and methodological framework

The first part of the paper focus on the theoretical and methodological framework of the three subjects urban

planning, evaluation and urban morphology recognizing an obvious disparity on the relative dimension of eachof these fields. Due to the largest extension of the urban planning field, the analysis focuses mainly in its

physical dimension.

Urban planning

In recent decades, urban planning has been suffering important transformations. The most significant one has

been the change on emphasis from the plan product to the planning process. The international literature reveals

three positions, those who favour the substitution of the rational-comprehensive model by the communicative

model (Healey, 1997, 2003; Innes, 1995; Khakee, 1998, 2003), those who favour the coexistence of both models

(Alexander, 1998; Voogd, 1998), and those who defend the integration of both in a more complex and diverse

framework where rationality prevails (Lichfield, 2001b).

This disagreement continues with the analysis of the connections between these theoretical developments and the

professional practice. If Archibugi (2004) argues that the enormous theoretical production of recent years did not

lead to a deeper understanding of the meaning of planning, or either to the clarification of its role, Mazza (2002)

sustains that this production has lead to some kind of planning de-professionalization, and to a slow down and

somehow uncertain development of technical knowledge often times considered almost equivalent to commonsense.

The physical dimension of urban planning

Since the 1980s, there has been an increasing emphasis on the physical form of cities inside urban planning

activity (Fainstein, 2000; Hall & Doe, 2000; Punter, 2002; Talen & Ellis, 2002). The authors intend to debate the

causes of the emphasis on the urban form; the way this subject is being explored, namely in the interaction with

the planning system of each country; and the consequences of the re-emergence of urban form as a major topic

of the general urban planning field.

Several causes can be identified associated with the renewed interest on the physical aspects of urban planning: a

new attention on the results of the planning proposals, a generalized disappointment with the adoption functional

zonings, the public debate of new physical planning trends, or the concerns about built heritage conservation.

Hall & Doe (2000) identify two possible causes: the importance of the urban form theme to the exercise ofpublic participation - assuming that the physical results of planning are the most obvious evidences to judge the

success of planning proposals - and the concern about sustainability, in a sense that the form of the city should be

designed to enable energy conservation and biodiversity.

Hall & Doe (2000) and Carmona (2003) argue that usually the planning systems of developed countries do not

have methods to provide for a good answer to the rebirth of physical form in urban planning. Still, the former

identifies a set of experiences on the exploration of the possibilities of planning systems, particularly on local

plans of some British and French cities.

Fainstein (2000) and Talen & Ellis (2002) argue that a theory of good urban form should have a more prominent

place in planning theory along with communicative planning or new theories on the equitable and just city.

These American authors share with Mandelbaum, Mazza and Burchell (1996) the idea that the dominant

theoretical frameworks on urban planning, provide a context for decision making, insights into the workings of

the planning process, and some important nonspatial normative content, but they provide no pattern language to

which planners may refer to when the moment comes to make decisions about the planning and development ofparticular urban places. As such, Talen & Ellis (2002) argue that the planning profession needs a renewed focus

on substance rather than process, and a well-articulated theory of good city form.

Evaluation

This section focus on four fundamental questions on the evaluation debate, namely, the tensions between the

positivist paradigm and the constructivist paradigm, the relationship between evaluation theory and planningtheory, the professional practice of urban planning evaluation and, finally the most relevant evaluation methods.

From the positivist paradigm towards the constructivist paradigm

In the absence of a general and consensus vision on the evaluation theory, developed thorough the 20th

century,many authors converge on the acknowledgment of an evolution from a positivist paradigm to a constructivist

paradigm. Some describe this evolution in four evaluation generations (Guba & Lincoln, 1989; Khakee 1998,

2003). According to Guba & Lincoln (1989) the first generation of evaluation exercises were intended to


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measure individual attributes, the second generation was geared towards the description of social programmes;

the third was dominated by judgments on the intrinsic and contextual values of the object, and the fourth was

centred around by the negotiation of claims, concerns and issues presented by the different stakeholders. Also

the evaluator role has evolved, from an initial position where he is mainly a technician, latter becoming a

descriptor, then a judge and, finally a mediator. The fourth generation goes beyond the scientific dimension,

including the human, political, social, cultural and contextual dimensions. These American authors identify two

major foundations for their contribution, a responsive focusing and a constructivist methodology.In recent years, several authors criticize this simplistic vision on the three positivist generations, adopting more

consensual positions (Patton, 2000; Van der Knaap, 2004) or moving away from the constructivist paradigm

(Pawson & Tilley, 1997).

Evaluation theory and planning theory

Evaluation theory and planning theory are in a permanent change. As a result the evaluation position itself on theplanning context is continually changing. Several authors explore this theme, raising some interesting questions

about this dynamic relationship: the influence of the planning theory on the kind of evaluation, the common

evolution of both fields, the need for more flexible evaluation approaches; and the possibility that some

theoretical trends would allow a better relationship with professional practice.

The way that planning, and particularly the plan concept, determines the evaluation criteria is discussed by Baer

(1997). Characterizing an ex-post evaluation, the American author debates the legitimacy of the measurement ofthe difference between the plan and the reality, exploring five possible answers: the reality is compared with the

excepted results in the absence of a plan; the reality is confronted with the expected results of the plan in a

blueprint plan; the reality is compared with the plan to understand what difference does an unforeseen

consequence of the plan on aLichfieldian focus; the reality may be connected to the plan in a indefinite way

in a Faludian focus; or the results may be ignored, since the most important is the dialogue with the community

in a typical post-modern plan.Khakee (1998) examine the way that the transformations of planning theory affect the evaluation functions and

characteristics, emphasizing the growing importance of the political context. The Swedish author identifies a

change of paradigms during the last fifty years, on the light of eight theoretical positions. He draws from the

rational model where optimization is the main function of evaluation as one intends to obtain the best

relationship between the achievement of results and the utilization of resources, towards the communicative

planning where the main function is the continuing evaluation of the political agenda and debate, and the

fundamental characteristic is the analysis of communicative rationality and of the robustness of alternativepolicies.

The practice of evaluation in urban planning

This section approaches the practice of evaluation in urban planning, the frequency these exercises, the gap

between evaluation theory and practice, the emerging European dimension, the integration of evaluation in the

planning process, the various evaluation stages, and the use of the evaluation conclusions.

Evaluation should be a component of the planning process, and yet, this reality is very different from country to

country, being legally required in some. There is a gap between evaluation theory and practice, and one of the

most evident aspects of this gap is the generalized use of qualitative methods in research, and the prominence of

quantitative methods in professional practice.

In the end of the 1990s, the European Commission published the Means for Evaluating Actions of a Structural

Nature (MEANS, 1999), intended to define an evaluation model for structural funds programmes, with anemphasis on socio-economic development. This report attempts to draw on the different practices and cultural

traditions of the Member States. Despite being a synthetic document, the report alerts to the risks of decision

making based on pre-established criteria and methods, without a previous concern on the actual results from a

particular evaluation exercise. Stame (2004) argues that the relationship between these general guidance

developed at an European level and the necessary specificity of a local application, can be assisted by a theory-

based evaluation.

Lichfield, Kettle & Whitbread (1975) alert for a deficient integration of the evaluation in the plan making

process, advancing also a set of principles presented in subsequent texts: since the beginning the evaluator

should be a member of the planning team; the evaluation procedures and criteria should be decided together with

the planning team; the evaluation criteria should also be the design criteria for the team that prepares the plan;

the necessary data for the evaluation should be defined in the beginning and be part of the data collection for the

plan making process; an on-going evaluation improves plan implementation and the eventual adjustments along

the process; the ex-post evaluation tests the achievements of the policies and the adequacy of the ex-ante

evaluation methods.


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The literature on evaluation in planning consensually sustains that the study of the on-going and ex-post

dimensions has a rather reduced expression, when compared with the analysis of the ex-ante dimension (Ho,

2003; Lichfield 1996, 2001a, 2003; Voogd, 1997). Lichfield (2001a) analyses the recent development on

evaluation in planning, in relation to the evolution of social program evaluation. In the former, the on-going and

ex-post evaluation have a marginal role, whereas in the latter, the ex-ante evaluation is usually devaluated, due to

the difficulties of the social sciences in providing reliable forecast. The British author challenges academics and

professionals on both fields to compare their works and methodologies.Ho (1998, 2003) and Weiss (1999) argue that although evaluation has a lot to offer to plan makers and to policy

makers, they seldom support their new proposals on the conclusions of previous evaluation exercises. In the

British context, Ho (2003) points out that in the period between 1968 and 1997, there are few examples of urban

regeneration initiatives that benefited from the lessons obtained through previous evaluation studies.

Evaluation methods

This section presents five of the most popular evaluation methods developed in the last fifty years: the Cost-

Benefit Analysis (CBA), the Planning Balance Sheet (PBS), the Goals-Achievement Matrix (GAM), the

Multicriteria Analysis (MA), and the Environmental Impact Assessment (EIA). The method developed by

Lichfield isinseparable from CBA.Similarly, contemporary MA is strongly related to GAM.

CBA is initially conceived to evaluate American federal projects on water resources. Later this methodology was

extended to the appraisal of several kinds of public actions and projects. It is probably the evaluation methodmost widely used. The technique, although complex, follow a simple principle - the association of a monetary

value to each identified effect of a project or action. CBA ignores considerations related to equity or

sustainability.

PBS is presented by Lichfield in the 1950s, and soon after applied by this author in urban and regional plans in

Britain. It goes further than CBA in two domains: it integrates non quantifiable impacts, introducing symbols in

the appraisal tables alongside with monetary impacts; it records detailed information of costs and benefits on thedifferent groups of persons affected by a proposed plan. More recently, Lichfield (1996) presents the CIE - a

natural evolution from PBS, with similar foundations on CBA and on the impact evaluation tradition.

Hill presented the GAM in his PhD thesis in 1966, as an attempt to eliminate the weaknesses of the existing

evaluation methods, particularly the CBA and the PBS. This method has been used in the evaluation of urban

plans in Great Britain.

MA emerged in the 1960s in France. The electre-techniques or concordance-tchniques soon became dominant

among the new evaluation methodologies. MA methods adopted the form of a matrix with at least twodimensions, one expressing the different project alternatives, and the other, the objectives and the evaluation

criteria.

In 1969, EIA is introduced in the American federal system. Nowadays, EIA constitutes one of the main policy

instruments of most national and regional environmental administration. The EIA process includes the

preparation of an environmental impact study, a reviewing procedure, public participation and often times an ex-

post evaluation (Partidrio & Pinho, 2000). Strategic Environmental Assessment is another instrument of impact

evaluation, geared towards the evaluation of policies, plans and programmes. It works with strategies and not on

specific development proposals, operating on larger temporal and geographical scales, with growing uncertainty

levels and thus requiring greater flexibility (Partidrio, 2003).

Urban Morphology

The emergence of an interdisciplinary field

The vision about the origins and developments of urban morphology presented in British literature in the

transition for the 1990s, is mainly focused on urban geography, somehow underestimating urban planning and

the architectural tradition, although these fields have been producing remarkable material for this body of

knowledge, particularly since the 1960s, albeit in a less systematic way. Although Larkham (1997) presents a

disciplinary approach supported by a typological reflection, it is Moudon (1997) who under the umbrella of the

International Seminar on Urban Form (ISUF) projects urban morphology as an emergent interdisciplinary field,

in which converge the existing British, Italian and French schools. British research tries to discover how cities

are built and why, in order to develop a city making theory. The Italian school focusing on the way cities should

be constructed, in order to establish an urban design theory. Finally, the French tries to understand the

consequences of previous experiences of city making, particularly the developments throughout the 19

th

and the20th centuries.


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Three European schools of urban morphology

Larkham (1997), Moudon (1997) and Whitehand (1992, 2001) find the origins of the British school of urban

morphology in the German geography. The connection between the two cultures is established by Conzen, a

German geographer that immigrates to the United Kingdom before the Second World War. Conzen defends an

inductive approach to the study of the urban phenomenon at a time that geography debates quantitative methods.

The Conzenian tradition is followed and reinforced by Whitehand, widening the scope of this approach, to the

economic issues, the building dynamics in its relationships with the city and its inhabitants. In 1974, Whitehand

found in the University of Birmingham, the Urban Morphology Research Group (UMRG), on which converge

the principle authors of present British urban morphology, namely Slater, Larkham, Kropf and Hall. Currently,

the UMRG is the largest research centre on the geographical aspects of urban form in the United Kingdom,

constituting a field of urban knowledge, through the study of urban history, and the agents and the ideas involved

in the creation and transformation of the cities. Larkham (1997), Moudon (1997) and Whitehand (1992, 2001),

identify some of the current research trends in the British school such as: urban morphogenesis, the study of the

actors responsible for the transformations of urban forms, the interaction between urban morphology and

building typology, and the relationships between urban morphology and urban planning.

The Italian school of urban morphology and typology was found by Muratori in the 1950s. His main contributionwas the idea that history is a privileged way of recovering the sense of continuity in architectural practice. For

this Italian architect, the urban and architectural crisis of the 1950s was caused by the assumption that an

intervention in the city would be more effective dividing the urban phenomena in particular aspects, which in

fact depend on specific contexts. Muratori intended to build a theoretical framework in order to explain the

creation and transformation of the urban form throughout the years. Caniggia, one of Muratoris assistants in

Rome, carry on the tradition after his death, transmitting his ideas in architectural terms, believing that thesimplification and reduction of the theoretical system of Muratori would facilitate its dissemination. Currently,

the core of the school is in Florence, with authors such as in Maffei, Cataldi and Vaccaro, all part of the Centro

Internationale per lo Studio dei Processi Urbani e Territoriali (CISPUT), found in 1981. The aim of this centre is

the promote and develop the typo-morphological research applied to the preservation and restoration of the built

heritage.

Darin (1998) identifies two primary references to the French study of urban form in the 1920s Lavedans Lhistoire de lurbanism and Potes Une vie de cit; Paris de sa naissance nos jours. In the 1960s the research

on cities is divided in two groups, the architectural schools of Paris-Belleville and Versalhes. Currently, the

Laboratoire de Recherche, Histoire Architectural et Urbaine - Societs (LADRHAUS) found in 1973, with

eminent members such as Castex and Darin, constitutes a fundamental reference on the study of territories, urbanmorphology, urban fabrics, building typology, and architectural analysis. In recent years, contributions coming

from different disciplinary backgrounds enhanced the reflection on the rationale behind the agents strategies on

space organization processes and on the use of typo-morphology tools and techniques.

The construction of an evaluation methodology

The second part of the paper is structured in two sections, the definition of a set of guidance principles, and the

establishment of the terms of reference for the application of the evaluation methodology to the cities of Lisbon

and Oporto. The following contributions stand out from the literature review: i) the characteristics of the

implementation process of local plans, ii) the specific features of the so-called on-going evaluation carried out by

the planning team throughout the implementation process of local plans, and iii) the nature of planning controls

over the morphological aspects of development projects most likely to influence the quality of urban life.

General principles

Bearing in mind the debates between the rational-comprehensive planning model and the communicative

planning model, and between the positivist and the constructivist evaluation paradigms, an on-going evaluation

methodology of municipal physical plans will be proposed. As mentioned above, the literature highlights the

scarce theoretical production and professional application of on-going evaluation methodologies. On the other

hand, the morphological dimension seems totally absent from the evaluation debate, despite a growing emphasis

on urban design as a major topic of debate in planning and the generalised adoption of a wider concept of builtenvironment.

An evaluation vision has to correspond to a planning vision. The city as a rather complex territory cannot be

taken by a municipal plan as a homogeneous platform. Different levels of planning uncertainties are always

present and as such should be dealt with. In some areas it should be possible to propose new open spaces, public

facilities, and the detailed design of subdivisions and urban development projects. In others one should not go

beyond a mere recommendation of the most suitable land uses. Kropf (1996, 1997) and Hall & Doe (2000)


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present some experiences of integration of urban form recommendations in the contents of municipal plans, as

far as the national planning legislation and regulations allows.

Probably the most important step in the design of an evaluation methodology is the formulation of the most

relevant assessment questions and criteria (see Table I). The methodology is expected to evaluate the rationality

and the performance of the plan and the conformity of the results achieved so far. The procedural dimension will

be most difficult to assess.

Table I: Evaluation questions and criteria

General criteria Specific criteria Evaluation questions

Plan rationality Relevance

Internal coherence

External coherence

Participation (plan making)

Are the plan proposals relevant to the city needs?

Have the several parts of the plan a logical

organization?

Is the plan coherent with other policies, programmesor plans implemented in the area?

Was there an effective public participation in plan

preparation?

Plan

performance

Utilization

Participation (implementation)

Was the plan used or consulted in decision making

during its implementation?

Was the plan used to promote communicative actionand interactive practice?

Results

conformance

Effectiveness

Efficiency

Leadership

Are the plan results in conformance with the plan

objectives?

Were the foreseen resources to attain those objectives

sufficient?

Had the plan a significant leading function in the

urban development?

As to the rationality of the plan, it is necessary to understand: if the plan objectives are justifiable comparatively

with the city needs and problems; if the several parts that constitute the document are organized in a logical way;

if there are conflicts or incoherencies relatively to other plans, programmes or policies for the area; and finally, if

the most significant groups and organizations have been heard during the plan preparation.As to the performance of the plan, one should realize that if the answers to the conformance questions are

positive, the performance issue is bound to have less importance. This criterion is intended to avoid a simplistic

position that would judge as plan failure, a situation where reality does not fit the corresponding forecast. When

reality is different from the planning forecast, one should understand the reasons why that is so. Another relevant

aspect is to understand if the plan was used to promote a communicative discourse.

As to the conformance of the results with the plan, it is important to realize to what extent the expected

objectives have been attained, if that happened at a reasonable cost, and if the plan played a leadership role in the

local development process.

This simultaneous evaluation of substance, process and results, draws on the model presented by Alexander &

Faludi (1989). This model is supported on three planning visions. This contribution had an enormous impact onthe planning literature on evaluation. The debate around the conformance concept was particularly relevant

(Baer, 1997; Talen, 1997; Laurian et al, 2004; Norton, 2005), as well as the investigation of new criteria to

distinguish good from bad planning (Alexander, 2002), and the reviewing criteria to assess strategic plans(Faludi, 2000).

Evaluators should design each evaluation procedure to suit the characteristics and requirements of each

particular situation, instead of following a rigid set of standardized procedures. They should also have a solid

knowledge of the strengths and weaknesses of each evaluation methods, and select the most appropriate one in

accordance to the nature of the problem under assessment. It is also important to understand the full implications

of the evaluation results for the plan implementation process. These implications can take two distinct forms, to

change the use of the plan or to change the substance of the plan. The use of the plan may not be difficult to

modify. However, a change in the plan contents is dependent on the specific planning system and may well be

difficult to get through. In any case it is important to explore the introduction of the necessary changes in a given

plan, in a transparent and balanced way, if that is clearly justified by the evaluation conclusions. In this way one

could profit from unexpected opportunities and/or take advantage of the introduction of a greater design detail.


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Application of the evaluation methodology in the cities of Lisbon and Oporto

In this section, the general conditions for the application of the proposed evaluation methodology to the master

plans (Plano Director Municipal) of Lisbon and Oporto are presented.

The choice of these two cases allows the consideration of two distinct on-going evaluation situations. The master

plan of Lisbon is in its final stages of implementation, whereas the master plan of Oporto has just been approved.As a general background note we have to point out that there is not a significant practice of plan evaluation in

Portugal, although some evaluation mechanisms are present in planning legislation.

Generally speaking, the municipal master plan is expected to establish the spatial structure for the whole territory

of the municipality, and to propose a development strategy able to integrate national and regional policy options

with local development objectives. The municipal master planfor Lisbon was prepared between 1990 and 1993,

being approved by the municipal assembly and ratified by the government in 1994. The main objectives of theplan are: the revaluation of the residential function in the city, particularly in its central area; the stabilization of

the consolidated urban fabric; the rehabilitation of an old industrial zone on the eastern part of the city for

advanced services industries and the development of a logistic platform; the enhancement of the urban

environmental quality; and the general improvement of the accessibility to the central area. The preparation of

the new municipal master planfor Oporto started in 2001 and the plan was approved by the present executive in

2005. The strategic objectives of the plan are: the strengthening of the urban identity of Oporto, the rehabilitationof the public space and of the built environment, the rationalization of the transportation systems, the reduction

of the existing urban imbalances, and the promotion of the historic quarters and of the central area.The application of the methodology will be supported by our previous work on the evolution of the urban form

of these two cities during 19th and the 20th centuries (Oliveira, 2004; Pinho & Oliveira, 2004).

Conclusions

Our methodological proposal is intended to contribute to strengthen the articulations between urban morphology,

urban planning and evaluation. The relationships between planning and evaluation have already some

consistency. The same can not be said of the other possible relationships in that triangle.

The methodology aims to evaluate in particular the implementation of municipal physical plans and will be

applied to the municipal master plans of Lisbon and Oporto. In the meantime, a number of evaluation questions

and specific criteria structured around the concepts of plan rationality, plan performance and conformance of

results have already been proposed and justified.

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Acknowledgements

This work has been supported by a research grant from the Portuguese Foundation for Science and Technology(FCT).

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