Nasa - wbs reference guide

Disponível somente no TrabalhosFeitos
  • Páginas : 46 (11256 palavras )
  • Download(s) : 0
  • Publicado : 26 de maio de 2012
Ler documento completo
Amostra do texto
Program/Project Management Series

Work Breakdown Structure
Reference Guide

National Aeronautics and

May 1994

Space Administration

2

Work Breakdown Structure Reference Guide

May 1994

Table of Contents
iii
Chapter 1: WBS Basic Information
Definition
WBS Types
Program/Project WBS
Contract WBS
Guidelines
Summary
Chapter 2: WBS Development and Maintenance
WBS andthe Project Life Cycle
WBS Activities
Development Considerations
Compatibility of PWBS and CWBS
Compatibility with Internal Organization Structure and Management Systems
Correlation with Other Requirements
Number of Levels
PWBS Levels
CWBS Levels
Cost Accounts
All Inclusiveness
PWBS
CWBS
Change Control
PWBS Development
Contractor-Proposed PWBS Changes
CWBS
Development TechniquesCoding of Elements
Preparing Diagrams
Preparing WBS Dictionary
Using Checklists
PWBS Checklist
Contractor-Proposed PWBS Changes Checklist
CWBS Checklist
Common Development Errors
Unsuitable Old WBS Error
Non-Product Elements Error
Functional Elements Error

May 1994

Work Breakdown Structure Reference Guide

1
2
2
3
5
6

7
8
9
9
9
10
10
10
10
10
12
12
12
12
1213
13
13
13
14
14
14
15
15
16
17
17
17
17

Chapter 3: WBS Use
Introduction
Technical Management
Specification Tree
Configuration Management
Integrated Logistic Support
Test and Evaluation
Work Identification and Assignment
Schedule Management
Plans
Revisions
Status
Cost Management
Cost Estimating
Budgeting
Accounting
Analysis and Control
Historical DatabaseDevelopment
Performance Measurement
Summary

19
20
20
20
21
21
21
22
22
22
22
23
23
23
23
23
24
24
24

Appendix A: Glossary

A-1

Appendix B: Acronym Listing

B-1

Appendix C: PWBS Examples

C-1

Appendix D: CWBS Examples

D-1

Appendix E: WBS Section of NHB 7120.5

E-1

ii

Work Breakdown Structure Reference Guide

May 1994

About This Reference GuideThe work breakdown structure (WBS) is an effective tool in managing NASA programs
and projects. It assists both NASA and contractors in fulfilling management
responsibilities. In accordance with NASA Handbook 7120.5, Management of Major
System Programs and Projects, a WBS is mandatory for major system acquisitions and
major projects, and will be used for other projects when practical. A WBS isrequired
when performance measurement is applied to a contract.
The purpose of this WBS reference guide is to support the completion of program and
project objectives within budget and schedule constraints. This reference guide can be
used for various work efforts including research, development, construction, test and
evaluation, and operations. The products of these work efforts may behardware,
software, data, or service elements (alone or in combination).
A glossary (Appendix A) and an acronym listing (Appendix B) have been included at the
end of this reference guide.

May 1994

Work Breakdown Structure Reference Guide

iii

This page left blank.

iv

Work Breakdown Structure Reference Guide

May 1994

Chapter 1:
WBS Basic Information
This chapter providesgeneral work breakdown structure information including definition,
types, guidelines and development process.

Definition
Each NASA program has a set of goals which are developed from NASA mission needs.
These program goals are expanded into specific project objectives. The function of
management is to plan and direct project activities to achieve the program goals.
The purpose of a workbreakdown structure (WBS) is to divide the program/project into
manageable pieces of work to facilitate planning and control of cost, schedule and
technical content. A WBS is written early in program/project development. It identifies
the total work to be performed and divides the work into manageable elements, with
increasing levels of detail.
The following example displays a portion of a...
tracking img