Efforts Calculation In cocomo model effort estimation models effort estimation models of cocomo tool

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2 weeks ago

Efforts Calculation In cocomo model effort estimation models effort estimation models of cocomo tool

https://www.gyanodhan.com/video/7A1.%20Computer%20Science/Software%20Engineering/341.%20Efforts%20Calculation%20In%20cocomo%20modeleffort%20estimation%20modelseffort%20estimation%20modelscocomo%20tool.mp4

The COCOMO (Constructive Cost Model) is a software cost estimation model that helps in estimating the effort, time, and cost required to develop software based on the project size (in thousands of lines of code – KLOC).

Contents

1 Effort Estimation in COCOMO
- 1.1 Basic Effort Estimation Formula:
2 Types of COCOMO Models:
3 Effort Estimation Models of COCOMO Tool
4 COCOMO Tool Features (in software)
5 Summary Table

Effort Estimation in COCOMO

Basic Effort Estimation Formula:

$person-months)=a×(KLOC)b\text{Effort (in person-months)} = a \times (\text{KLOC})^b$

Where:

KLOC = Thousands of Lines of Code
a, b = Constants depending on the project type (Organic, Semi-detached, Embedded)

Types of COCOMO Models:

1. Basic COCOMO Model

Estimates effort and development time based only on the size of the software (KLOC).

Project Categories:

Type	a	b
Organic	2.4	1.05
Semi-detached	3.0	1.12
Embedded	3.6	1.20

Example: For an Organic project of 32 KLOC:

$person-months\text{Effort} = 2.4 \times (32)^{1.05} \approx 91.6 \text{ person-months}$

2. Intermediate COCOMO Model

Considers 12 cost drivers (like reliability, complexity, team experience) in addition to size.

Formula:

$Effort=a×(KLOC)b×EAF\text{Effort} = a \times (\text{KLOC})^b \times EAF$

Where EAF = Effort Adjustment Factor based on cost drivers.

3. Detailed COCOMO (COCOMO II)

Breaks the project into modules and applies different cost drivers to each, used for modern software projects.

Effort Estimation Models of COCOMO Tool

Model	Key Features
Basic COCOMO	Based only on code size (KLOC)
Intermediate COCOMO	Adds cost drivers (product, personnel, project, platform)
Detailed COCOMO	Phase-wise estimation, tailored for modern tools/processes
COCOMO II	Supports reuse, prototyping, software tools, modern lifecycles

COCOMO Tool Features (in software)

When using a COCOMO estimation tool, such as open-source or commercial software:

Input Parameters:
- KLOC or Function Points
- Cost Drivers
- Development Environment settings
Output:
- Effort (Person-Months)
- Schedule (Months)
- Team size
- Cost (if rate is provided)
Use Cases:
- Planning new projects
- Evaluating outsourcing costs
- Comparing tools/technologies

Summary Table

Parameter	Basic Model	Intermediate Model	Detailed Model (COCOMO II)
Code Size
Cost Drivers
Phase Analysis
Use in Tooling	Limited	Moderate	Extensive

Would you like a step-by-step numerical example for a COCOMO calculation using real KLOC and cost drivers?

Efforts Calculation In cocomo model effort estimation models effort estimation models of cocomo tool