EQUIPMENT System Element Allocations in .NET

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EQUIPMENT System Element Allocations
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For those requirements allocated to the EQUIPMENT element and documented in the SPS, the question becomes: WHAT system entities such as PRODUCT, SUBSYSTEM, ASSEMBLY, SUB-
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LEVEL 0 User s System
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Operational Capabilities Matrix
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Requirements Allocation & Flow Down Requirements Allocation & Flow Down
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Level 2 System Elements
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PERSONNEL EQUIPMENT MISSION RESOURCES PROCEDURAL DATA SYSTEM RESPONSES
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Reqmts. Allocation
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Level 1 MISSION SYSTEM
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Level 1 SUPPORT SYSTEM
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Level 2 System Elements
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PERSONNEL EQUIPMENT MISSION RESOURCES PROCEDURAL DATA FACILITIES SYSTEM RESPONSES
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Figure 21.5 Multi-Level System Operational Capability Allocations
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System Operational Capability Derivation and Allocation
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System Capabilities Matrix
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PHASE SYSTEM ELEMENTS OP. ENVIRON.
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Design & Construct. Constraints Architectural configuration
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OP L. MODE
1 17 33 49 65 81 81 81 81 81 81 2 18 34 50 66 82 82 82 82 82 82 3 19 35 51 67 83 83 83 83 83 83 5 21 37 53 69 85 85 85 85 85 85 6 22 38 54 70 86 86 86 86 86 86 7 23 39 55 71 87 87 87 87 87 87 8 24 40 56 72 88 88 88 88 88 88 9 25 41 57 73 89 89 89 89 89 89 10 26 42 58 74 90 90 90 90 90 90 11 27 43 59 75 91 91 91 91 91 91 12 28 44 60 76 92 92 92 92 92 92 13 29 45 61 77 93 93 93 93 93 93 14 30 46 62 78 94 94 94 94 94 94 15 31 47 63 79 95 95 95 95 95 95 16 32 48 64 80 96 96 96 96 96 96
PRODUCT #1
PRODUCT #2
2 5 8 11 14 17 20 23 26 29 32
Required Operational Capabilities
Requirements Design & Construction Constraint Requirements NATURAL Environment Element INDUCED Environment Element Requirements OP. ENV. Man-Made System Threats Reqmts. OP. ENV. Man-Made System Interface Reqmts. SYSTEM RESPONSES Requirements FACILITY Element Requirements PERSONNEL Element Requirements EQUIPMENT Element Requirements PROCEDURAL DATA Element Requirements MISSION RESOURCES Element Requirements
1 4 7 10 13 16 19 22 25 28 31
12 15 18 21 24 27 30 33
X = Reference to Required Operational Capability Description
Figure 21.6 System Requirements Allocations to Product Level
ASSEMBLY, and PART levels are accountable for providing the EQUIPMENT level operational capabilities and levels of performance to satisfy each SPS requirement We answer this question by expanding each set of requirements allocations to lower levels. Figure 21.6 illustrates our discussion. Each requirement allocated to the EQUIPMENT element is allocated to PRODUCT 1, PRODUCT 2, and PRODUCT 3 as shown at the right side of the graphic. Each capability number represents the various types of SPS requirements allocated to PRODUCT 1, PRODUCT 2, and PRODUCT 3. Once the allocations are made, the set of requirements allocated to each PRODUCT are documented in the topical section of the respective PRODUCT Item Development Speci cation (IDS), as shown in Figure 21.7.
Top-down/Bottom-up Iterations
The preceding discussion focused on the top-down allocation and ow down of requirements to various system levels of abstraction. However, despite the nomenclature this is not a linearly sequential process. It is a highly iterative process whereby requirements allocations between levels must be reconciled within the architecture for that particular item and traded off within the system capability and performance constraints. The result is a set of highly iterative top-down/bottomup/left-right/right-left set of decision-making activities. Therefore, the oval icon in the upper left center portion of Figure 21.7 symbolizes this top-down/bottom-up process for all levels of system decomposition.
21.7 SUMMARY
In summary, this chapter introduced the concept of deriving and allocating required operational capabilities to multi-level system entities. We began with the system s modes of operation and identi ed the various operational capabilities and interactions required for each mode. This included the system elements for the
PRODUCT #3
3 6 9
System Performance Specification (SPS)
PRODUCT Reqmts. Allocations
General Exercises
PRODUCT Reqmts. Allocations
PRODUCT #2 Highly Iterative PRODUCT #1 PRODUCT #3
System Performance Specification (SPS)
PRODUCT #1 Item Development Specification
Topical Coverage
Environment Element Requirements NATURALEnvironment Element Requirements INDUCED ENV. Man-Made System Threats OP. ENV. Man-Made System InterfaceReqmts. OP. Element Requirements Reqmts. SUPPORT Element Requirements FACILITY Element Requirements PERSONNEL EQUIPMENT Element Requirements PROCEDURAL DATA Element Requirements MISSION RESOURCES Element Requirements
X = Reference to Required Operational Capability Description
Design & Construction Constraint Requirements
1 4 7 10 13 16 19 22 25 28 31
2 5 8 11 14 17 20 23 26 29 32
3 6 9 12 15 18 21 24 27 30 33