Table 1.
List the factors affecting the cost of software maintenance
| Row | Indexes Related to the Information of Cost Factors |
| 1 | Product Characteristics |
| 2 | Required Software Reliability |
| 3 | Database Size |
| 4 | Complexity Product |
| 5 | Computer Characteristics |
| 6 | Execution Time Constraint |
| 7 | Main Storage Constraint |
| 8 | Virtual Machine Volatility |
| 9 | Computer Turnaround Time |
| 10 | Personnel Characteristics |
| 11 | Annalist Capability |
| 12 | Application Experience |
| 13 | Programmer Capability |
| 14 | Virtual Machine Experience |
| 15 | Programming Language Experience |
| 16 | Project Characteristics |
| 17 | Modern Programming Practices |
| 18 | Use of Software Tools |
| 19 | Schedule Project Constraint |
| 20 | Factors of Project maintenance |
| 21 | Software Experience |
| 22 | Application Understanding |
| 23 | Software Development reference Access to Technical |
| 24 | Document Quality |
| 25 | Software Old |
| 26 | Group Capability |
| 2? | Environment Dependency |
| 28 | Structure Independency |
| 29 | Costs of Computer Networks |
| 30 | Security |
| 31 | Back up Data |
| 32 | Computer’s Virus |