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1
Work Breakdown Structures
(WBS)
2
WBS
track spent money on a program or track the anticipated a need
to spend money
covered everything
all the money went or was going
and system engineers to make sure that all effort required for
program or project has been accounted for and tracked
actual effort projected in area of the WBS is exceeding
projections
3
What is a WBS ?
fundamental project management tool for defining
and organizing the total scope of a project, using a
hierarchical tree structure.
4
What’s a WBS ?
work to be executed by the program team
2) define a set of planned outcomes that collectively
and exclusively represent 100% of the project scope.
nt level, the children of a parent
node collectively and exclusively represent 100% of
the scope of their parent node.
5
What is a WBS ?
-designed WBS describes planned outcomes
instead of planned actions.
ds of the project, and can
be predicted accurately
An easy way to think about a work breakdown
structure is as an outline or map of the specific
program
6
WBS Dictionary
or two describing the technical content of each
element of the WBS
cryptic, it is a good way to understand what exactly is
in the WBS
7
100% Rule
of the work defined by the project scope and
captures all deliverables – internal, external, interim
– in terms of the work to be completed, including
project management (and systems engineering).
8
100% Rule
ant principles
guiding the development, decomposition and
evaluation of the WBS.
sum of the work at the “child” level must equal 100%
of the work represented by the “parent” and the WBS
should not include any work that falls outside the
actual scope of the project, that is, it cannot include
more than 100% of the work…
9
100% Rule Example
Project
Part A Part B
Part A.1 Part A.2 Part B.1 Part B.2 Part B.3
Parts A and B must add
up to 100% of the work
of the project
Parts B.1, B.2
and B.3 must
add up to 100%
of the work in
Part B
10
Figure 1: WBS Construction Technique. This
exemplary WBS is from PMI's Practice Standard for
Work Breakdown Structures (2nd Edition).
SE may or may not be included
In project management
http://upload.wikimedia.org/wikipedia/en/e/e4/WbsConstruction
.png
http://en.wikipedia.org/wiki/Image:WbsConstruction.png
http://en.wikipedia.org/wiki/Image:WbsConstruction.png
11
Examples of WBS
Product WBS
13
14
WBS Levels for SOFIA
• Project (or System level) - integrating all of the
systems of the project
• Observatory System (Subsystem) – integrating all of
the parts of the observatory – instruments and facility
• Airborne Facility (Segment level) – integrating all of
the parts on the aircraft
• Telescope Element (Element level) - Integrating the
parts of the telescope
15
Note – Systems
Engineering at
4 different levels
ct - integrating all
of the systems of the
project
–
integrating all of the
parts of the observatory
– instruments and
facility
Segment – integrating
all of the parts on the
aircraft
e Element
- integrating the parts
of the telescope
16
17
Why is a WBS Important to a
Systems Engineer ?
1. Budgeting: The proper way to get effort budgeted in a big
project is to get it into the WBS – so if you want systems
engineering to have a budget, need to understand the WBS
2. Systems Engineering View: effort may exist at many
levels in the project, examining the WBS allows you to see
where you need to insert Systems Engineering efforts
3. Integration View: If Systems Engineering is going to
integrate a project, it needs to know what is going on. The
budgeted effort is reflected in a WBS. The WBS is the place
to see where effort is being expended that may require
integration.
18
Why is a WBS Important to a
Systems Engineer ?
4. Technical Performance Budgeting: It is a good place
to start for building technical performance budgets, like
weight, electrical power, pointing accuracy
5. Cost Estimating and Scheduling: Systems Engineers
are always heavily involved in cost estimating and
scheduling and the WBS is a good tool for both of these
efforts
19
Rules for WBS
not a chronological listing.
tice to construct a project schedule
before
designing a proper WBS.
construction
before completing the house design.
difficult to
follow the 100% Rule at all levels of the WBS hierarchy.
shadows
the organizational chart.
ned to
organizational
elements, a WBS that shadows the organizational structure is
not
descriptive of the project scope and is not outcome-oriented.
20
Rules for WBS
details, require formal change control.
outcome-oriented and not be prescriptive of
methods.
changes in planned outcomes require a higher
degree of formality.
21
Once you have the WBS
-hardware items such as software,
analysis, test, integration and project management
year) that you use for accounting/budgeting
estimating
cost for that item for that year
you get yearly budget
the WBS
schedule
in the WBS
22
Cost Estimation Relationship -
Example
Jan Feb Mar Apr May Total
Planning $500 $500 $500 $300 $100 $2,100
Dinner $100 $100 $100 $100 $7,000 $7,400
Room $0 $0 $1,500 $4,000 $500 $6,000
Guests $100 $100 $100 $100 $100 $500
Staff $100 $100 $100 $100 $2,000 $2,400
Speakers $100 $100 $100 $3,000 $100 $3,400
Total $900 $900 $2,400 $7,600 $9,800 $21,800
Banquet is scheduled for May 15th
23
$2,100 $7,400
$6,000
$500
$2,400 $3.000
Why Use a WBS
24
• The work breakdown structure has a number of
benefits in addition to defining and organizing the
project work.
• A project budget can be allocated to the top levels of
the work breakdown structure, and department budgets
can be quickly calculated based on the each project's
work breakdown structure.
• By allocating time and cost estimates to specific
sections of the work breakdown structure, a project
schedule and budget can be quickly developed from the
WBS.
• As the project executes, specific sections of the WBS
can be tracked to identify project cost performance and
identify issues and problem areas in the project.
Why Use a WBS
25
• Project WBSs can also be used to identify potential
risks in a given project.
• If a WBS has a branch that is not well defined then it
represents a scope definition risk.
• These risks should be tracked in a project log and
reviewed as the project executes.
• By integrating the WBS with an organizational
breakdown structure, the project manager can also
identify communication points and formulate a
communication plan across the project organization.
Why Use a WBS
26
• When a project is falling behind, referring the WBS
will quickly identify the major deliverables impacted
by a failing work package or late sub-deliverable.
• The WBS can also be color coded to represent sub-
deliverable status.
• Assigning colors of red for late, yellow for at risk,
green for on-target, and blue for completed
deliverables is an effective way to produce a heat-map
of project progress and draw management's attention to
key areas of the work breakdown structure.
WBS Guidelines
27
• The top level represents the final system deliverable
• Sub-deliverables contain work packages that are assigned to
a organization’s unit
• All elements of the work breakdown structure don’t need to
be defined to the same level
• The work package defines the work, duration, and costs for
the tasks required to produce the sub-deliverable
• Work packages should not exceed an agreed to period
• Work packages should be independent of other work
packages in the work breakdown structure
• Work packages are unique and should not be duplicated
across the work breakdown structure
Homework
Class
Work Breakdown Structure.
28

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1 Work Breakdown Structures (WBS) 2 WBS .docx

  • 1. 1 Work Breakdown Structures (WBS) 2 WBS track spent money on a program or track the anticipated a need to spend money covered everything all the money went or was going and system engineers to make sure that all effort required for program or project has been accounted for and tracked
  • 2. actual effort projected in area of the WBS is exceeding projections 3 What is a WBS ? fundamental project management tool for defining and organizing the total scope of a project, using a hierarchical tree structure. 4 What’s a WBS ? work to be executed by the program team 2) define a set of planned outcomes that collectively and exclusively represent 100% of the project scope. nt level, the children of a parent node collectively and exclusively represent 100% of
  • 3. the scope of their parent node. 5 What is a WBS ? -designed WBS describes planned outcomes instead of planned actions. ds of the project, and can be predicted accurately An easy way to think about a work breakdown structure is as an outline or map of the specific program 6 WBS Dictionary or two describing the technical content of each element of the WBS
  • 4. cryptic, it is a good way to understand what exactly is in the WBS 7 100% Rule of the work defined by the project scope and captures all deliverables – internal, external, interim – in terms of the work to be completed, including project management (and systems engineering). 8 100% Rule ant principles guiding the development, decomposition and evaluation of the WBS. sum of the work at the “child” level must equal 100% of the work represented by the “parent” and the WBS should not include any work that falls outside the actual scope of the project, that is, it cannot include more than 100% of the work…
  • 5. 9 100% Rule Example Project Part A Part B Part A.1 Part A.2 Part B.1 Part B.2 Part B.3 Parts A and B must add up to 100% of the work of the project Parts B.1, B.2 and B.3 must add up to 100% of the work in Part B 10 Figure 1: WBS Construction Technique. This exemplary WBS is from PMI's Practice Standard for
  • 6. Work Breakdown Structures (2nd Edition). SE may or may not be included In project management http://upload.wikimedia.org/wikipedia/en/e/e4/WbsConstruction .png http://en.wikipedia.org/wiki/Image:WbsConstruction.png http://en.wikipedia.org/wiki/Image:WbsConstruction.png 11 Examples of WBS Product WBS 13 14 WBS Levels for SOFIA • Project (or System level) - integrating all of the systems of the project • Observatory System (Subsystem) – integrating all of
  • 7. the parts of the observatory – instruments and facility • Airborne Facility (Segment level) – integrating all of the parts on the aircraft • Telescope Element (Element level) - Integrating the parts of the telescope 15 Note – Systems Engineering at 4 different levels ct - integrating all of the systems of the project – integrating all of the parts of the observatory – instruments and
  • 8. facility Segment – integrating all of the parts on the aircraft e Element - integrating the parts of the telescope 16 17 Why is a WBS Important to a Systems Engineer ? 1. Budgeting: The proper way to get effort budgeted in a big project is to get it into the WBS – so if you want systems
  • 9. engineering to have a budget, need to understand the WBS 2. Systems Engineering View: effort may exist at many levels in the project, examining the WBS allows you to see where you need to insert Systems Engineering efforts 3. Integration View: If Systems Engineering is going to integrate a project, it needs to know what is going on. The budgeted effort is reflected in a WBS. The WBS is the place to see where effort is being expended that may require integration. 18 Why is a WBS Important to a Systems Engineer ? 4. Technical Performance Budgeting: It is a good place to start for building technical performance budgets, like weight, electrical power, pointing accuracy 5. Cost Estimating and Scheduling: Systems Engineers are always heavily involved in cost estimating and scheduling and the WBS is a good tool for both of these efforts
  • 10. 19 Rules for WBS not a chronological listing. tice to construct a project schedule before designing a proper WBS. construction before completing the house design. difficult to follow the 100% Rule at all levels of the WBS hierarchy. shadows the organizational chart. ned to organizational elements, a WBS that shadows the organizational structure is not descriptive of the project scope and is not outcome-oriented. 20
  • 11. Rules for WBS details, require formal change control. outcome-oriented and not be prescriptive of methods. changes in planned outcomes require a higher degree of formality. 21 Once you have the WBS -hardware items such as software, analysis, test, integration and project management year) that you use for accounting/budgeting estimating cost for that item for that year
  • 12. you get yearly budget the WBS schedule in the WBS 22 Cost Estimation Relationship - Example Jan Feb Mar Apr May Total Planning $500 $500 $500 $300 $100 $2,100 Dinner $100 $100 $100 $100 $7,000 $7,400 Room $0 $0 $1,500 $4,000 $500 $6,000 Guests $100 $100 $100 $100 $100 $500 Staff $100 $100 $100 $100 $2,000 $2,400 Speakers $100 $100 $100 $3,000 $100 $3,400 Total $900 $900 $2,400 $7,600 $9,800 $21,800 Banquet is scheduled for May 15th
  • 13. 23 $2,100 $7,400 $6,000 $500 $2,400 $3.000 Why Use a WBS 24 • The work breakdown structure has a number of benefits in addition to defining and organizing the project work. • A project budget can be allocated to the top levels of the work breakdown structure, and department budgets can be quickly calculated based on the each project's work breakdown structure. • By allocating time and cost estimates to specific sections of the work breakdown structure, a project
  • 14. schedule and budget can be quickly developed from the WBS. • As the project executes, specific sections of the WBS can be tracked to identify project cost performance and identify issues and problem areas in the project. Why Use a WBS 25 • Project WBSs can also be used to identify potential risks in a given project. • If a WBS has a branch that is not well defined then it represents a scope definition risk. • These risks should be tracked in a project log and reviewed as the project executes. • By integrating the WBS with an organizational breakdown structure, the project manager can also identify communication points and formulate a communication plan across the project organization.
  • 15. Why Use a WBS 26 • When a project is falling behind, referring the WBS will quickly identify the major deliverables impacted by a failing work package or late sub-deliverable. • The WBS can also be color coded to represent sub- deliverable status. • Assigning colors of red for late, yellow for at risk, green for on-target, and blue for completed deliverables is an effective way to produce a heat-map of project progress and draw management's attention to key areas of the work breakdown structure. WBS Guidelines 27 • The top level represents the final system deliverable • Sub-deliverables contain work packages that are assigned to
  • 16. a organization’s unit • All elements of the work breakdown structure don’t need to be defined to the same level • The work package defines the work, duration, and costs for the tasks required to produce the sub-deliverable • Work packages should not exceed an agreed to period • Work packages should be independent of other work packages in the work breakdown structure • Work packages are unique and should not be duplicated across the work breakdown structure Homework Class Work Breakdown Structure.
  • 17. 28