Transcript Slide 1

Project Management
Work Breakdown Structure
and the
"Yellow Sticky" Process
glb - 5/2003
Project Management
The Work Breakdown Structure
What is a project?
A temporary endeavor undertaken to create a unique product or service.
What is a Work Breakdown Structure (WBS)?
An activity oriented family-tree division of work tasks that define the entire project.
The Work Breakdown Structure
WBS Terminology:
Activity: A task or work package performed over a period of time.
Relationships/Precedence: Dependencies that exist between activities.
Duration: Length of the period of time to complete a task.
Milestone: Zero time duration activity.
Early Start: The earliest an activity can start based on project logic.
Late Start: The latest an activity can start without delaying a project completion.
Early Finish: The earliest an activity can finish based on early start and duration.
Late Finish: Latest an activity can finish without delaying a project completion.
Float: The amount of time an activity can be delayed without delaying the project finish date.
Total Float: The amount of time that a pathway may be delayed from it's early start without delaying the project finish date.
Critical Path: The longest time period from start to completion of a project; also the shortest total length of the project.
The Work Breakdown Structure
Task Relationships:
–Finish to Start: Activity 1 must be totally finished before activity 2 can start.
Activity 2
Activity 1
–Start to Start: Activity 2 can not start before activity 1 starts.
Activity 1
Activity 2
The Work Breakdown Structure
Task Relationships:
–Finish to Finish: Activity 2 can not finish until activity 1 finishes.
Activity 1
Activity 2
The Work Breakdown Structure
"Yellow Sticky" Exercise:
Early
Start
Early
Finish
Task Name / Brief Description:
Late
Start
Duration:
Resource:
Late
Finish
Uses 3 X 5 Yellow Stickum Note Pads
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Activities/Tasks
To Make: Toast, Eggs, and Coffee
Toast
Eggs
Get Bread
Get Pan
Toast It
Butter Toast
Coffee
Setup
Put Water In
Get Dishes
Melt Butter
Put Coffee In
Set Table
Cook Egg
Turn on
Maker
Pour Coffee
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Set Precedence
Get Pan
Start:
Butter Toast
Toast It
Get Bread
Cook Egg
Melt Butter
Finish:
Alarm
Clock
Eat
Breakfast
Put Water In
Put Coffee In
Get Dishes
Turn on
Pour Coffee
Set Table
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Add Durations
Get Bread
Toast It
Butter Toast
1
3
1
Start:
Get Pan
Alarm
Clock
1
Cook Egg
Melt Butter
Finish:
5
2
Eat
Breakfast
Put Water In
Put Coffee In
1
1
Turn on
Pour Coffee
4
1
Get Dishes
Set Table
2
3
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Perform Forward Pass
2
2
1
6
5
5
Get Bread
Toast It
Butter Toast
1
3
1
2
2
1
Get Pan
Start:
9
4
4
Cook Egg
Melt Butter
Finish:
9
1
1
5
2
1
Alarm
Clock
2
3
2
Put Water In
Put Coffee In
1
1
1
3
7
3
7
8
Turn on
Pour Coffee
4
1
3
6
Get Dishes
Set Table
2
3
Determine Early Start and Early Finish
Eat
Breakfast
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Perform Backward Pass
2
2
1
5
5
1
Get Pan
9
4
4
9
1
8
8
3
2
2
1
Start:
Butter Toast
Toast It
Get Bread
4
6
5
5
Cook Egg
Melt Butter
Finish:
9
1
1
Alarm
Clock
1
2
1
1
2
Put Water In
2
1
3
2
3
1
1
3
2
9
7
Turn on
4
4
8
3
1
6
Set Table
6
6
Determine Late Start and Late Finish
3
Eat
Breakfast
8
9
Pour Coffee
8
4
Get Dishes
4
5
7
3
Put Coffee In
3
4
4
2
2
9
9
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Determine Critical Path
2
2
1
5
5
1
Get Pan
9
4
4
9
1
8
8
3
2
2
1
Start:
Butter Toast
Toast It
Get Bread
4
6
5
5
Cook Egg
Melt Butter
Finish:
9
1
1
Alarm
Clock
1
2
1
1
2
Put Water In
2
1
3
2
3
1
1
3
2
9
7
Turn on
4
4
8
3
1
6
Set Table
6
6
3
Eat
Breakfast
8
9
Pour Coffee
8
4
Get Dishes
4
5
7
3
Put Coffee In
3
4
4
2
2
9
Key: Any actions to shorten the overall project plan must
be done to the critical path.
9
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Determine Total Float
2
2
1
Butter Toast
Toast It
Get Bread
4
6
5
5
5
5
1
9
1
8
8
3
3
2
2
1
Get Pan
Start:
Cook Egg
Melt Butter
Finish:
9
0
1
1
Alarm
Clock
9
4
4
2
1
4
4
2
2
5
9
Eat
Breakfast
1
1
1
2
Put Water In
2
1
3
2
3
1
7
Turn on
Put Coffee In
3
7
3
4
4
8
1
3
1
3
3
4
2
6
Set Table
Get Dishes
6
6
9
Pour Coffee
8
4
8
3
9
9
The Work Breakdown Structure
Yellow Sticky Exercise: Make Breakfast - Determine Activity/Task Float
2
2
1
5
5
1
Butter Toast
0
0
2
2
1
Get Pan
9
1
8
8
3
0
Start:
6
5
5
Toast It
Get Bread
4
3
3
3
9
4
4
Cook Egg
Melt Butter
Finish:
9
1
1
Alarm
Clock
2
1
1
1
1
1
2
Put Water In
2
1
3
1
4
9
8
1
9
3
3
2
8
Pour Coffee
8
4
3
6
Set Table
Get Dishes
4
7
Turn on
4
6
Eat
Breakfast
1
3
1
9
7
3
Put Coffee In
3
5
1
3
2
4
4
2
2
6
3
9
Activity/Task Float (Exclusive / Or) - Any one task on a pathway can use the total float, or
the total float can be shared among all of the tasks on the pathway. However, the total float
can not be exceeded without affecting the project end date.
The Work Breakdown Structure
WBS Terminology:
Activity: A task or work package performed over a period of time.
Relationships/Precedence: Dependencies that exist between activities.
Duration: Length of the period of time to complete a task.
Milestone: Zero time duration activity.
Early Start: The earliest an activity can start based on project logic.
Late Start: The latest an activity can start without delaying a project completion.
Early Finish: The earliest an activity can finish based on early start and duration.
Late Finish: Latest an activity can finish without delaying a project completion.
Float: The amount of time an activity can be delayed without delaying the project finish date.
Total Float: The amount of time that a pathway may be delayed from it's early start without delaying the project finish date.
Critical Path: The longest time period from start to completion of a project; also the shortest total length of the project.
Project Management
Work Breakdown Structure
and the
"Yellow Sticky" Process
glb - 5/2003