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Estimation of System Complexity

Overview. Motivation and Factors Contributing to ComplexityQuantifying and Entering Complexity FactorsAlgorithms for Computing ComplexityResults, Conclusions and Recommendations. Motivation Ultimate Objective Required New Approach. Existing tools (PRICE and SEER) deficient. They are not configu

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Estimation of System Complexity

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    1. Estimation of System Complexity Michael Ernstoff Raytheon Systems El Segundo, CA 90245 m.ernstoff@ieee.org

    2. Overview Motivation and Factors Contributing to Complexity Quantifying and Entering Complexity Factors Algorithms for Computing Complexity Results, Conclusions and Recommendations

    3. Motivation Ultimate Objective Required New Approach Existing tools (PRICE and SEER) deficient. They are not configured to reflect the statement-of-work tailoring often necessary to match scope to budget. (Risk is a separate issue for program management.) Tools based on regression analysis of history inappropriate. Relevant historical data is too sparse and often contaminated.

    4. Motivation Quantifying Complexity is Essential Product Line - Known that of baseline program. System Complexity Requirements Volatility Schedule Aggressiveness Platform Staffing etc.

    5. Resource Estimation Process Overview

    6. Quantifying Complexity Factor Requires evaluating interfaces What does a system engineer do? Coordinates negotiation of interfaces between subsystems Formally specifies and tests subsystem interfaces Assembles subsystems and verify performance at interfaces.

    7. Quantifying Complexity Factors Impact of system decomposition

    8. Quantifying Complexity Factors Identifying & Rating Interfaces

    9. Quantifying Complexity Factors Rating individual sub-to-sub system interactions

    10. Quantifying Complexity Factors Indicating Repeats, Re-use and Learning

    11. Quantifying Complexity Factors Impact of Repeats On j-k Interactions

    12. Quantifying Complexity Factors Impact of Repeats On j-j Interactions

    13. Quantifying Complexity Factors Impact of Repeats and Re-use

    14. Computing Complexity Spread Sheet Tool

    15. Computing Complexity Representative Worksheet

    16. Computing Complexity Adjusting Individual Interactions

    17. Computing Complexity Output of spread sheet

    18. Application of Complexity Factor Representative Resource Forecasts

    19. Conclusions

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