1. Constructive COTS Model (COCOTS) Status Chris Abts cabts@sunset.usc.edu USC Center for Software Engineering Annual Research Review Annual Research Review Feb. 6, 2001 Feb. 6, 2001 Copyright 2001 University of Southern California

2. 2CA 2/06/01 Briefing Outline COCOTS Overview Research Highlights Since ARR 2000 Data Highlights New Glue Code Submodel Results Next Steps Benefits

3. 3CA 2/06/01 COCOTS Overview

4. 4CA 2/06/01 Research Highlights Since ARR 2000 Data collected for four sources of effort Reasonably robust calibration of Glue Code submodel Spreadsheet Tool

5. 5CA 2/06/01 Data Highlights Mean % of Total COTS Effort by Activity (+/- 1 SD) 49.07% 50.99% 61.25% 20.27% 20.75% 21.76% 31.06% 11.31% -7.57% -7.48% 0.88% 2.35% -20.00% -10.00% 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% assessmenttailoring glue code system volatility % Person-months

6. 6CA 2/06/01 Data Highlights

7. 7CA 2/06/01 Data Highlights

8. 8CA 2/06/01 Data Highlights

9. 9CA 2/06/01 New Glue Code Submodel Results Current calibration looking reasonably good – Excluding projects with very large, very small amounts of glue code (Effort Pred): [0.5 - 100 KLOC]: Pred (.30) = 9/17 = 53% [2 - 100 KLOC]: Pred (.30) = 8/13 = 62% – For comparison, calibration results shown at ARR 2000: [0.1 - 390 KLOC]: Pred (.30) = 4/13 = 31% Propose to revisit large, small, anomalous projects – A few follow-up questions on categories of code & effort Glue code vs. application code Glue code effort vs. other sources

10. 10CA 2/06/01 New Glue Code Submodel Results (Detailed)

11. 11CA 2/06/01 Next Steps Data conditioning – Follow-up questions on categories of code & effort Further data collection – Accelerating collection of 10 additional data points over next 8 weeks (including a first pass at COTS maintenance data) – As always, can you help? COCOTS total lifecycle model – Two FAA-sponsored workshops, Int’l COCOMO forum breakout session held in 2000; USC-SEI-CeBASE workshop on COTS-based systems this week – COCOTS data survey being expanded to address total lifecycle issues based on insights gained from above meetings

12. 12CA 2/06/01 Benefits Existing – Independent source of estimates – Checklist for effort sources – (Fairly) easy-to-use development phase tool On the Horizon – Empirically supported, tightly calibrated, total lifecycle COTS estimation tool