A Method for Service Identification from Business Process Models in a SOA Approach Leonardo Azevedo...

A Method for Service Identification from Business Process Models in a

SOA Approach

Leonardo Azevedo1,2, Flávia Santoro1,2, Fernanda Baião1,2,

Jairo Souza1, Kate Revoredo1, Vinícios Pereira1, Isolda Herlain3

1NP2Tec – Research and Practice Group in Information Technology2Departament of Applied Informatics, Federal University of the State of Rio de

Janeiro3Petrobras – Petróleo Brasileiro S/A

OverviewMotivationRelated workGoal of the proposalBPMCandidate servicesOur proposalConclusion/Future work

MotivationSOA – Service Oriented Architecture

More flexibleSupports platform- and protocol-independent

services in a distributed environmentService

a piece of self-contained business functionality exposed interfacesinvoked through messagesConcentrate on the business value of an

interfaceBridge the business/IT gap

Motivation: Service life-cycle

Life-cycle model of traditional software engineering may not be directly applied in a SOA approachNew architectural roles and development tasks

Examples of challengesServices and business requirements alignmentSecurity constraintsService versioning to accommodate business

changesThe need for service development approach is

well recognizedConsensus: services must be aligned to business

processes

Related workSome proposals for service identification from

business process models: [Arsanjani, 2004; Erl 2005; Papazoglou and

Heuvel, 2006; Marks and Bell 2006; McBride, 2007; Gu and Lago, 2007; Josuttis, 2007; Klose et al, 2007; Fareghzadeh, 2008; Jamshidi et al. 2008]

However, proposalsDo not present a step-by-step approachOr present principles or guidelines that are very

difficult to followOr suggest business process modeled in a

detailed level that is difficult to accomplish

There has to be an integrated view of the organizational business processesThere is a common process repository

Processes are linked to each other through interfacesProcesses share global elements

clusters (input/output data), business rules, business requirements

Our premisse

Our goal

Candidate service identification from business process models.

Candidate service Service abstraction (not implemented) which,

during the design phase of a service life-cycle model, could be chosen to be implemented as a physical service or as an application function.

[Erl 2005]

Integrates several views about business domainProcess of work (how?)Concepts of domain (What?)... Quality Questions 5W1H

Set of models

Business Modeling

Process Activity

How?

Where?Localization

Event

When?

Business rule

Goal

Objective

External factors

Why?

Role

Department

Who?

SystemProduct

External data

What?

The most important elements for our work

“Statements about constraints that organization's business process must satisfy” [Guide Business Rule Project 2008].

Business rules

Sondainstalada

Serviço desondagemconcluído

Poço prontopara sertestado

Grupo deexecução de

intervenção empoços

Testar eficiênciavolumétrica

Elaborarplanejamento

diário

UN-RNCE/ATP-ARG/IP

Empresa deintervenção em

poços

Prover auxílio aogrupo de

execução daintervenção

Realizarintervenção

diária

Gerar boletimdiário deoperação

Necessidade deauxílio técnico

Avaliar auxíliosolicitado naintervenção

Necessidade deauxílio da gerência

de Reservatório

Prover auxílio àmesa de

operações

Capacidade deprover auxílio

Solicitar auxílioà mesa deoperações

Solicitar auxílioà gerência deEngenharia de

Poços

Sem necessidadede auxílio técnico

Imprimir boletimdiário deoperação

Enviar boletimdiário deoperação

Prepararintervenção demanutenção

Finalizarintervenção

Prepararintervenção decompletação

Poçonecessitado

de maisintervenção

Resultado deteste

insatisfatório

UN-RNCE/ST/EP

Define dependencies among activities.Make business process flow explicit.

Define specific rules that apply to a process activity

Activity details

Supplysensor

information

Previous dayproduction ofmeasurment

node

Tank stockof

measurmentnode

PI


node

Tank stockof

measurmentnode

Stocks ofnon-automatic

tanks

Get tank stocks ofmeasurement node

Measurement nodenet production of

previus day

Supply tankstock

information

Supplymeasurment

node netproduction

A business requirement specifies a function executed by system or by a user using a system.

Usually, they are identified during process analysis in order to improve the process.

Supplysensor

information


node

Tank stockof

measurmentnode

PI


node

Tank stockof

measurmentnode


tanks



previus day

Supply tankstock

information

Supplymeasurment

node netproduction

Business requirement

Business requirement

System where the requirement is implemented.

Types of candidate services

Candidate data service

Database

CRUDoperations

Candidate business service

Business rule operations.

Eventualy can read/write data directly from/to

databases.

Candidate utility service

Service whose operations can be used in different contexts, adjusting some of its parameters.

Services Identification Method

Candidate services

Business

Data

Utility

Reuse

XX

XX

XX

Cohesion

XX

XX

XX

...

XX

XX

XXCandidate business service

Candidate data

service



Candidateutility

service

2. Identif ication and Classif ication of Candidate

Services

3. Consolidation of Candidate Services

Output

Steps

Automatic activities

Automatable activities

Partially supported by

systems

SYS

1. Selection of Activities

Carries out & Supports

Org

aniz

atio

na...

Org

aniz

ati.

...

MCCP

Registrarprodução das

UPGNs

Produçãodas

concessões...


correntes

Produçãodas

correntes,UPGN'...

Verificarregistros de

produçãonecessários

Produçãodiária

disponível

Produçãodas

UPGNsregistrada

Produçãodiária dasU-Fluidosdisponível

Produçãodas U-Fluidos

registrada

Controlador daprodução

Produçãodas

correntesdisponível

Verificarprodução de

C5+ a consumir

Produção deC5+

identificada

Produção deC5+ não

identificada

Produçãodas

correntesregistrada

Verificarprodução de

óleo a consumir

Produção deóleo não

identificada

Produção deóleo

identificada

Registrarconsumo das

correntes


UPGNs

Realizarfechamentomensal d...


U-Fluidos


U-Fluidos

Consumodas

UPGNsregistrado

Consumodas U-Fluidos

registrado

Consumodas

correntesregistrado

RequisitosexistentesRequisitosexistentes

Existing requirements

RequisitosexistentesRequisitosexistentesRequirements

of demand

Models

Serviços candidatos

qualificados

Negócio

Dados

Utilitário

Reuso

XX

XX

XX

Coesão

XX

XX

XX

...

XX

XX

XX

Serviço candidato

qualificado de negócio

Serviço candidato

qualificado de dados

Serviço candidato

qualificado utilitário

RequisitosexistentesRequisitosexistentesRequisitosexistentes

RequisitosexistentesRequisitosexistentesRequisitosdemanda

A

B C D E F

Consolidação deserviços

candidatos


qualificados

Negócio

Dados

Utilitário

Reuso

XX

XX

XX

Coesão

XX

XX

XX

...

XX

XX

XX

Serviço candidato


Serviço candidato


Serviço candidato




Proporção dos serviços de acordo com sua classificação

58%30%

2%

1%

8%

1%

Heurística1

Heurística2

Heurística3

Heurística4

Heurística5

Heurística6


candidatos

1. Selection of activities

TO-BE models of demand

Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Other

Org

aniz

atio

na...

.

Diariamente

SYS

Fornecer dados deautomação do

campo

PISOLAR-

DIAGNOSTICO

Dados deprodução eestoque dos

nós de mediçãoarmazenados

Analisar condiçãode produção do nó

de mediçãoNecessidade dediagnóstico da

produção do diaidentificada

Obter dados daprodução líquida

acumulada do diados nós de... SYS

Calcular produçãolíquida projetada

para o dia dos nósde medição

OP

Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Other

Org

aniz

atio

nal e

lem

ents

& A

ppl..

..

OP

SYS

Verificar condiçãode produção do nó

de medição

Variação depotencial no nó

de mediçãoidentificada

SOLAR-DIAGNOSTICO

UN-RNCE/ATP-ARG/PRGC

UN-RNCE/ENGP/MC

CP

SYS

Verificar estoquedos tanques

SYS

Verificar variaçõesde potencial do nó

de medição

Analisarinformações sobre

estoque dostanques

Analisar variaçõesde potencial do nó

de medição

Perda deprodução

identificada

Analisar perda deprodução do nó de

medição

Problemassolucionados

Problemas nãosolucionados

Realizar açõespara solução da

causa da variaçãodo nó de medição

Justificar variaçãoda produção do nó

de medição

SYS

Identificar poçosque entraram em

produção do nó demedição

Analisar poçosque entraram em

produção no nó demedição

Poços queentraram em

produçãoidentificados

SYS

Verificar perda deprodução

Visualizardiagnostico da

produção


produção

Dados deprodução eestoque dos

nós de mediçãoarmazenados

Perda deprodução nãoidentificada

Variação depotencial no nóde medição não

identificada

Problema noestoque dostanques nãoidentificado

Poços queentraram emprodução nãoidentificados

Perda deprodução

identificada


Problema noestoque dos

tanquesidentificado





identificada




Problema naprodução

identificado

Problema naprodução nãoidentificado


identificado



tanquesidentificado



Perda deprodução

identificada



SYS

Consultarproduções

anteriores do nó demedição

Variações daprodução

calculadas

Enviarinformações deautomação do

campo


tanquesidentificado

Visualizar resumodo diagnostico da

produçãoVisualizar resumodo diagnostico da

produção


produção

Necessidade devisualizar

diagnóstico emmaioresdetalhes





Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Carries out & Supports Other

Org

aniz

atio

nal e

lem

ents

& A

ppl..

..

Analisarinformações sobre

estoque dostanques

Analisar variaçõesde potencial do nó

de medição

Analisar perda deprodução do nó de

medição

Problemassolucionados

Problemas nãosolucionados

Realizar açõespara solução da

causa da variaçãodo nó de medição

Justificar variaçãoda produção do nó

de medição

Analisar poçosque entraram em

produção no nó demedição


produção


produção

Perda deprodução

identificada



tanquesidentificado





identificada





identificado



identificado



tanquesidentificado



Perda deprodução

identificada




produçãoVisualizar resumodo diagnostico da

produção


produção







Selection of activities

AutomaticSys

Automatable

Partially Supported by

systems

2. Identification and Classification of Candidate Services

Scenario: evaluate several possible solutionsProposal: use heuristics methods (successive

analysis to produce a solution)Syntactic and semantic analysis of the process

model

AutomaticSys

Automatable

Partially Supported by

systems



Workflow patterns

(structure) Liberar ordens deprodução

planejadas

Programador daprodução

SAP-PPMCCP

COHVOMPP

Ordem deprodução

Ordem deprodução

Ordem de produção

Liberação de ordensde produção

Activities

(semantics)

Identification and classification of candidate services

Service identificationServices can be identified from:

Process flowsWorkflow pattern

Recurrent flows of activities existing in different processes

Activities:Input and output dataBusiness ruleBusiness requirement

X

Supplysensor

information


node

Tank stockof

measurmentnode

PI


node

Tank stockof

measurmentnode


tanks



previus day

Supply tankstock

information

Supplymeasurment

node netproduction

Heuristics for candidate service identification

Heuristic 1 (Business Rule)Heuristic 2 (Business Requirement)Heuristic 3 (Cluster)Heuristics for service identification from

workflow patterns Heuristic 4 (Sequence of Activities)Heuristic 5 (AND)Heuristic 6 (XOR)Heuristic 7 (OR)Heuristic 8 (Loop)Heuristic 9 (Process Interface)Heuristic 10 (Multi-Instance Activity)

(Van der Aalst et al., 2003)

Heuristic 1 (Business Rule)

A candidate service must be identified from a business rulebusiness rule.A candidate service must be identified from a business rulebusiness rule.Candidate service

Name Calculate measurement node production of Estreito

Type Candidate business service

Input Measurement node

Output Production of Estreito measurement node

Source Business rule “Production calculus of Estreito measurement node”

Activity Supply sensor information

Description Production of Estreito measurement node to be analyzed = Production of measurement node of Estreito B – Production of fiscal measurement node of Angico – Production of fiscal measurement node A – Production of fiscal measurement node B.

Supplysensor

information


node

Tank stockof

measurmentnode

PI


node

Tank stockof

measurmentnode


tanks



previus day

Supply tankstock

information

Supplymeasurment

node netproduction

Name Description

Production calculus of Estreito measurement node

Production of Estreito measurement node to be analyzed = Production of measurement node of Estreito B – Production of fiscal measurement node of Angico – Production of fiscal measurement node A – Production of fiscal measurement node B.

Production calculus of Estreito measu…

Get tank stocks of measurement node

Stocks of non-automatic tanks

Heuristic 2 (Business Requirement)

A candidate service must be identified from a business requirementbusiness requirement.A candidate service must be identified from a business requirementbusiness requirement.Candidate service

Name Query measurement node tank information

Type Candidate data service

Input Measurement node

Output Asset code, measurement node name, oil stock volume in the tank in the end of the day

Source Business requirement “Supply tank stock information ”

Activity Supply sensor information

Description PI system must supply following information about measurement nodes’ tank stocks, accordingly to business rule Get tank stocks of measurement node:- Asset code;- Measurement node name;- Tank oil stock at the end of the day.

Supplysensor

information


node

Tank stockof

measurmentnode

PI


node

Tank stockof

measurmentnode


tanks



previus day

Supply tankstock

information

Supplymeasurment

node netproduction

Name Description

Supply tank stock information

PI system must supply following information about measurement nodes’ tank stocks, accordingly to business rule Get tank stocks of measurement node:- Asset code;- Measurement node name;- Tank oil stock at the end of the day.

Production calculus of Estreito measu…

Get tank stocks of measurement node

Stocks of non-automatic tanks

Heuristic 5 (AND)

A service candidate must be identified from an AND-patternAND-pattern. A service candidate must be identified from an AND-patternAND-pattern.

AND-pattern is a structure started in a point in the workflow where a single flow is divided into multiple streams, which can run in parallel, and finalized at a point in the workflow where multiple parallel streams converge into a single flow, synchronizing them, or where branches end in final event

Getcustomer's

history

Get financialinformation

Get informationfrom stealing

Systemfunction(actual)

Customer's historyobtained

Finantialinformation

obtained

Stealinginformation

obtained

Process

Heuristic 4 (AND)

A service candidate must be identified from an AND-patternAND-pattern. A service candidate must be identified from an AND-patternAND-pattern. Candidate service

Name Get information for customer request evaluation

Type Candidate data service

Input Customer identification

Output Customer’s history; financial information; stealing information

Source Heuristic AND

Activity Get customer’s information; Get financial information; Get information from stealing

Description


Candidate utility service

Consolidation

Principles for high-quality service

implementation, organization’s quality criteria

Candidate services

Business

Data

Utility

Reuse

XX

XX

XX

Cohesion

XX

XX

XX

...

XX

XX

XXCandidate business service

Candidate data

service



Candidateutility

service

2. Identif ication and Classif ication of Candidate

Services


Output

Steps

Automatic activities

Automatable activities

Partially supported by

systems

SYS

1. Selection of Activities

RequisitosexistentesRequisitosexistentes

Existing requirements

RequisitosexistentesRequisitosexistentesRequirements

of demand

Models Serviços candidatos

qualificados

Negócio

Dados

Utilitário

Reuso

XX

XX

XX

Coesão

XX

XX

XX

...

XX

XX

XX

Serviço candidato


Serviço candidato


Serviço candidato




Proporção dos serviços de acordo com sua classificação

58%30%

2%

1%

8%

1%

Heurística1

Heurística2

Heurística3

Heurística4

Heurística5

Heurística6


candidatos




qualificados

Negócio

Dados

Utilitário

Reuso

XX

XX

XX

Coesão

XX

XX

XX

...

XX

XX

XX

Serviço candidato


Serviço candidato


Serviço candidato




A

B C D E F


candidatos

Experimental testsThe method was experimented at Petrobras

The largest Oil Company from BrazilBusiness process: Diagnose daily oil

productionImportant process within the Exploration and

Production (E&P) - Upstream areaProcess aims at maximizing company results Real time physical sensor information was used

Part of digital fields projectTO-BE process19 activities, control flows, 90 business rules

and 37 business requirements

Experimental testsStep 1) Activity selection

19 activities were selectedStep 2) Candidate service identification and

classification147 candidate servicesBusiness rule and business requirement

heuristics produced 57% and 30%, respectively

Experimental testsStep 3) Consolidation of Candidate Services

Service Reuse Degree, Link Candidate Service and System, Link Candidate Service and Demand Requirements,

Link Candidate Service and Activities, Identify Candidate Services Dependencies, Candidate Utility Service Identification

No service of this type was identifiedCandidate service Type Reuse Implem. Req.

Demand’s requirements

Calculate measurement node production of type appropriation of Estreito

Business 1 -

Calculate daily predicted net production of measurement node

Business 1 - Calculate daily predicted net production of measurement nodes

Query measurement nodes for production diagnose

Data 1 - Supply measurement node net production information

Activities Candidate service 1 2 3 4 5 6 Calculate difference between daily predicted net production related to previous month

X

Calculate difference between daily predicted net production related to previous days

X

Expert feedbackExpert evaluation of resulting candidate

servicesConsolidated information helped them in service

implementationIdentification of reuse and which services to

orchestrateAlignment of service x business needs

ConclusionSeveral challenges in SOA

Service modeling, design, monitoring and managementOur proposal

Top-down approach: Services identification from business process models

Set of heuristicsSemantic and syntactic analysis of process elements

Systematic approachInput: Business process model (TO-BE)Output: candidate services (classified, described, and consolidated)

Conclusion

This information helps service designer to better design and plan service implementation

Explicit link between business process constructs and service descriptions can be made

Tracking changes from business models that impact IT,

Easier to find which services must be changed for time-to-market.

Ongoing and future work

OngoingDevelopment of supporting tool

ARIS (IDS-Scheer tool)

Study of heuristics and tool support for next phases (analysis, design, implementation, deployment and maintenance)

New criteria (performance, service composition, granularity in terms of hardware, bandwidth etc)

Future workExperimental tests in other domains

A Method for Service Identification from Business Process Models in a

SOA Approach

Thank you! Questions

Leonardo Azevedo1,2, Flávia Santoro1,2, Fernanda Baião1,2,

Jairo Souza1, Kate Revoredo1, Vinícios Pereira1, Isolda Herlain3

1NP2Tec – Research and Practice Group in Information Technology2Departament of Applied Informatics, Federal University of the State of Rio de

Janeiro3Petrobras – Petróleo Brasileiro S/A

??

A Method for Service Identification from Business Process Models in a SOA Approach Leonardo Azevedo...

Documents

Transcript of A Method for Service Identification from Business Process Models in a SOA Approach Leonardo Azevedo...