PBS & WBS Flashcards
PBS
Product Breakdown Structure
WBS
Work Breakdown Structure
Product breakdown structure is another good example of _______
System Architecture
Another name for System Hierarchy
System Architecture or PBS
Why make PBS?
- Find subsystem interfaces
- Allocate system resources
- Establish confidence of overall system based on subsystem performance
Hierarchical Levels
- Mission
- System - spacecraft, launch vehicle, ground support, etc
- Segments - flight segment = instruments, launch vehicle, spacecraft
- Elements - spacecraft = structure, power, adcs, propultion
- Components - Solar Arrays = structures, solar cells, cover glass
- Parts - solar cells
Element: Mission
Individual system or groups of systems operated to meet specific set of reqs.
Element: System
Composite of hardware, software, skills, personnel, and techniques capable of performing and operation role. Includes facilities, equipment, materials, services, software, technical data, and personnel required.
Element: Segment
Grouping of elements that are closely related and which often physically interfaces.
Element: Element (haha)
A complete integrated set of subsystems capable of accomplishing and operational role or function.
Element: Component
A function subdivision of a subsystem and generally a self-contained combination of items performing a function necessary for subsystem operation.
Element: Part
A hardware element that is not normally subject to further decomposition.
Define WBS:
A hierarchical breakdown of a product and the work required for design, production and operation of the product. Should include division of deliverable items and associated services.
Based on PBS: _______.
WBS
How is WBS Built?
By adding the necessary service elements such as management, systems engineering, integration, verification, and logistics to each level of the PBS.
A ____ shows the components from which the system was formed.
PBS
A ____ Shows all the work components necessary to produce a complete system
WBS
WBS is used for:
- Task/Work scheduling
- Cost estimation
- Product dev. documentation
- Project status reporting
When should you make a WBS?
Pre-Phase A, conceptual design phase, early mission formulation
The WBS describes ____ not products.
Functions
True or False: WBS should have branch points that are consistent with how the PBS elements will be integrated.
True
True or False: WBS should not be entirely consistent with PBS
False
A ____ captures the hierarchy of the system and is a representation of its architecture.
PBS
A ____ extends the ____ in that it captures all of the work necessary for a project by adding non-product work necessary for a successful project.
WBS, PBS
