Project estimation task decomposition method-WBS

Principles of WBS decomposition:

The principle means that WBS cannot break down items or contain any products or activities out of the scope of the project.

Vertical refers to whether the WBS decomposition should be fine enough to meet the task allocation, detection and control purposes.

WBS decomposition method:

Full communication from top to bottom

One-to-one communication

Group Discussion

WBS decomposition criteria:

The decomposed activity structure is clear.

Logically form a large activity

Integrates all key factors

Contains temporary milestones and monitoring points

All activities are clearly defined

You have learned how to break down tasks. Only by breaking down tasks are you aware of them. You can work in an orderly manner and arrange your schedules as a whole.

Workbreakdownstructurewbs: groups project elements based on deliverables, it summarizes and defines the entire scope of work of the project. Each lower layer represents a more detailed definition of the project work.

In project management practice or PMP examination, the work breakdown structure (WBS) is the most important content. WBS is always at the center of the planning process. It is also used to prepare a schedule, resource requirements, and costs.
Budget, risk management plan and procurement plan. WBS is also an important basis for controlling project changes. The project scope is defined by WBS, so WBS is also a comprehensive tool for the project.

WBS has four main purposes:

1. WBS is a planning and design tool that describes the concept. It helps the project manager and project team determine and effectively manage the project's work.

2. WBS is a structural design tool that clearly shows the links between project work.

3. WBS is a planning tool that shows the overall picture of the project and details the work that must be done to complete the project.

4. WBS defines milestone events that can report project completion to senior management and customers as a reporting tool for project status.

WBS should contain the following information:

Project product or service structure, project organization structure, and project stage division.

WBS
It is a group of project elements oriented to project deliverables. These elements define and organize the overall scope of work of the project. The work not included in WBS is not within the scope of the project. Each layer of WBS drops.
Provides a more detailed definition and description of the project. The project deliverables should be further broken down into WBS in the scope definition process, because a good working breakdown can be:

A. Prevent deliverables from missing items.

B. Help the project manager to focus on the project objectives and clarify their responsibilities.

C. Establish a visual project deliverables to estimate workload and allocate work.

D. help improve the accuracy of time, cost, and resource estimates.

E. Help the project team establish and obtain the commitment from the project personnel.

F. Define a benchmark for performance measurement and project control.

G. Assist in clear communication of work responsibilities.

H. establish a framework for the development of other project plans.

I. helps analyze the initial risks of the project.

WBS has the following features:

A. The work package can be assigned to another project manager for planning and execution.

B. The work package can be further divided into the WBS of the subitem through the subitem.

C. The work package can be further divided into activities when developing the project progress plan.

D. The work package can be undertaken by the only department or contractor. A commitmentpackage is used for subcontracting outside the Organization ).

E. Definition of Work Packages should consider the 80-hour rule (80-hourrule) or two week rule, that is, the completion time of any work package should not exceed 80 hours. At the end of every 80 hours or less, only the completion of the work package is reported. Through this regular check method, Project changes can be controlled.