Elisati Hulu. Definition “a deliverable-oriented hierarchical decomposition of the work to be...
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Transcript of Elisati Hulu. Definition “a deliverable-oriented hierarchical decomposition of the work to be...
WORK BREAKDOWN STRUCTURES
Elisati Hulu
Definition
“a deliverable-oriented hierarchical decomposition of the work to be executed by the project team to accomplish the project objectives and create the required deliverables.
It organizes and defines the total scope of the project.
Each descending level represents an increasingly detailed definition of the project work.
The WBS is decomposed into work packages.’’
Characteristics (1) Is deliverable-oriented Is hierarchical and constructed in such manner that
each level of decomposition includes 100% of the work of its parent element, and
each parent element has at least two child elements Defines the full scope of the project and includes all project
related work elements including all internal,external and interim deliverable
Includes only those elements to be delivered by the project Uses nouns and adjectives to describe the deliverables, not
verbs Employs a coding scheme that clearly depicts the hierarchical
nature of the project Contains at least two levels of decomposition Is created by those performing the work with technical input
from knowledgeable subject matter experts and other project stakeholderss
Characteristics (2)
Includes Project or Program Management at level 2 of the hierarchy
Includes WBS Dictionary that describes and defines the boundaries of the WBS elements
Contains work packages that clearly support the identification of the tasks, activities and milestones that must be performed in order to deliver the work package
Communicates the project scope to all stakeholders
Is updated in accordance with project change management procedures
Examples:
Examples: Simple WBS
Examples: Larger WBS
WBS Decomposition
The logic of WBS decomposition is also something that varies from project to project.
The most common forms of WBS decomposition are breakdowns by the following: Function Role Method Deliverables (components)
WBS representation
tabular
The steps in creating a typical WBS are: Define the project’s end product.
This is usually no more than a title: “House at Avenue Drive” for example.
It forms the root of the Work Breakdown Structure document.
Define the main deliverables. These are the main components of the project’s end product, for example, for a house,
External construction, Internal construction, and so on. These become sections or ‘main branches’ under the root, defined in the previous step.
The steps in creating a typical WBS are (2) Break down the main
deliverables into their sub-components using as many sub-branches as needed until you have manageable ‘units of work’ which do not need to be subdivided further.
These units of work should be of a size that the project manager can easily handle. For example, something
that a worker or a team of workers can accomplish in a week might represent a unit of work.
Too much subdivision is counter productive as the project manager will then have to get too involved in the project details.
Finally you should have a structure with the root at one end and, furthest from the root, units of work. Taken together, the units of work make up the total work in the project, and there should be no overlap between them.
Division of work in the WBS: the 100% rule
Entering costs to the WBS
ADV for ATM Software
Essential requirements E1 Financial transactions shall be authorized by an
ATM card and a password E2 Financial transactions shall be terminated if a
customer fails to enter the correct password « settable » times
E3 Financial transaction shall allow quick cash withdrawals
E4 Financial transaction shall provide a printed receipt for each transaction
E5 The ATM shall retain the information listed in the requirements specifi cation, section 3.2.1, for each customer transaction
E6 Financial transaction shall process Terminate requests from customers
Desirable requirements
D1 Financial transaction should accommodate balance inquiry transactions
D2 Financial transaction should accommodate standard withdrawal transactions
D3 Financial transaction should accommodate deposit transactions
D4 Customers should be allowed to conduct multiple transactions per session
Optional requirements
O1 Financial transaction could support debit card transactions
O2 Financial transaction could support payment of utility bills
O3 Financial transaction could allow customers to purchase postage stamps which will be disbursed by the ATM hardware