use microsoft project to solve it :

Activity Estimated time Predecessor 1. Planning 2 weeks 1.1. Project charter 01 week (Initial Proposal) 12. Feasibility study I week 12. Technical Feasibility 03 days (Technical Feasibility Report) 12.2. Financial Feasibility 02 days (Financial Feasibility Report) Is Review 2. Initial Approval of estimated budget 01 day 3. Designing of weeks 3.1 User Interface Designing 03 days 3.2. Database Designing 02 days (ERD) 20 Review 4. Development 2 weeks 4.1. Unit coding 10 Days 4.2. Integration 04 days 5. Testing of week 5.1. Unit Testing 03 days 52. System Testing 02 days Final Review and Approval 6. Training 01 Weeks Activity Estimated time Predecessor 1. Planning 2 weeks 1.1. Project charter 01 week (Initial Proposal) 12. Feasibility study I week 12. Technical Feasibility 03 days (Technical Feasibility Report) 12.2. Financial Feasibility 02 days (Financial Feasibility Report) Is Review 2. Initial Approval of estimated budget 01 day 3. Designing of weeks 3.1 User Interface Designing 03 days 3.2. Database Designing 02 days (ERD) 20 Review 4. Development 2 weeks 4.1. Unit coding 10 Days 4.2. Integration 04 days 5. Testing of week 5.1. Unit Testing 03 days 52. System Testing 02 days Final Review and Approval 6. Training 01 Weeks