Detailed Kokomo Model Lecture Notes

Introduction

• Discussion on the Third Kokomo Model
• Previously covered Basic and Intermediate Kokomo Models
• Today's focus: Detailed Kokomo Model.

Overview of the Detailed Kokomo Model

• Computes effort and development time using intermediate model formulas.
• Provides phase-wise effort and development time for software development lifecycle (SDLC) models.
• Applicable to three project types: Organic, Semi-Detached, and Embedded.

Development Phases and Effort/Time Allocation

1. Planning and Requirements Phase

   • Effort: 6% to 8% of total project effort
   • Development Time: 10% to 40% of total project time
   • Less effort and time, varies by project mode and size.

2. Design Phase

   • Effort: 16% to 18%
   • Development Time: 19% to 30%

3. Programming (Coding) Phase

   • Effort: 16% to 20%
   • Development Time: 24% to 64%

4. Integration and Testing Phase

   • Effort: 16% to 34%
   • Development Time: 18% to 34%

Calculation Process

• Phase-wise Formula:
  • Total Effort: ( ext{E} = ext{AI} imes (1000 ext{ lines of code})^{ ext{VI}} imes ext{EAF} )
  • Total Development Time: ( T = ext{CI} + D )

Steps to Compute Total Effort and Development Time

1. Calculate EAF (Effort Adjustment Factors) using 15 cost drivers.
2. Use Intermediate Model Formula:
   • Retrieve Ai and Bi from Intermediate Model Table.
   • Calculate total effort and development time.
3. Phase-wise Allocation:
   • Use appropriate multipliers to allocate total effort and time across phases using tables.

Example Problem

• Project: Develop a full-screen editor (total size = 12,000 lines of code).
• Components:
  • Screen Edit: 4000 LOC
  • Command Language Interpreter: 2000 LOC
  • File I/O: 1000 LOC
  • Cursor Movement: 2000 LOC
  • Screen Movement: 3000 LOC

Assumptions for EAF

• Declare values for product attributes and personal attributes based on assumptions from cost driver tables.
• Combine selected factors to calculate EAF.

Detailed Calculation

• Compute total effort (E) and development time (T) using the intermediate model formulas.
• Use multipliers for each phase to derive phase-wise effort and development time:
  • Use ( ext{mu p} ) values to find phase-wise effort.
  • Use corresponding multipliers for development time.

Summary

• The detailed Kokomo model provides a structured approach to estimate effort and time across different phases of software development.
• Allows for tailored estimations based on project type and attributes.

Conclusion

• Apply learned concepts to solve practical estimation problems in software projects.
• Continuous learning encouraged!