T. E. Potok - University of Tennessee Software Engineering Dr. Thomas E. Potok Adjunct Professor UT Research Staff Member ORNL

2 Software Engineering CS 594T. E. Potok - University of Tennessee Exam Review  CMM  Requirements Engineering  Project cost estimation  Cost Models (COCOMO)  Process Models (PERT)  Project Planning  Software Development Life Cycles  Risk Management

3 Software Engineering CS 594T. E. Potok - University of Tennessee CMM  Five levels of maturity for an organization – 1) Initial; – 2) Repeatable; – 3) Defined; – 4) Managed; – 5) Optimizing.

4 Software Engineering CS 594T. E. Potok - University of Tennessee How to gather and record requirements  Traditional approach is the JAD (Joint Application Development) session  Domain experts are taught rudimentary data modeling and data flow diagramming techniques, then lead by an expert into developing a design  A beginning design can be developed in a few days

5 Software Engineering CS 594T. E. Potok - University of Tennessee OO approach  Another methods is the use of scenarios, or use cases to gather requirements  The customer deals in his or her domain describing what the computer system should do.  The programmer needs to understand the basics of the domain, and work through inconsistencies or problems in the scenarios.

6 Software Engineering CS 594T. E. Potok - University of Tennessee Productivity  Team Productivity = Project Output/Project Effort  Programmer productivity = Programmer Output/Programmer Effort  Productivity typically measured in LOC/Person-month

7 Software Engineering CS 594T. E. Potok - University of Tennessee Basic COCOMO  Organic - small to medium size, familiar projects – Person-months=2.4(KLOC) 1.05 – Development-time = 2.5(PM).38  Semidetached - intermediate – Person-months=3.0(KLOC) 1.12 – Development-time = 2.5(PM).35  Embedded - ambitious, tightly constrained – Person-months=3.6(KLOC) 1.20 – Development-time = 2.5(PM).32

8 Software Engineering CS 594T. E. Potok - University of Tennessee PERT  Project Evaluation and Review Technique – Developed for the Navy Polaris Missile Program – Directed Acyclic Graphs of project activities – Used for estimation and control of a project

9 Software Engineering CS 594T. E. Potok - University of Tennessee Two components of risk  Potential loss or impact – What is the impact of a potential risk – If it happens, what is the result Catastrophic - substantial loss of life, money, or property Major - Significant injury, loss of money, or property Minor - Mild injury, loss of money, or property Trivial - Minimal injury, loss of money, or property

10 Software Engineering CS 594T. E. Potok - University of Tennessee Two components of risk  Probability of occurrence – What is the probability that the risk will occur – How likely is it that the risk will occur Quite likely - will occur Likely - Probably will occur Unlikely - Probably will not occur Rare - Very unlikely