Planning and Budget PERT chart 1 3 3

Planning and Budget

PERT chart 1 3 3 8 9 1 0 0 2 8 5 11 12 5 4 3 5 6 5 5 3 13 17 8 17 13 3 0 2 4 8 9 4 4 7 13 13 1 9 18 18

PERT chart 2 n es ls TF = lf - es - t FF = ef - es - t IF = ef - ls - t t n+1 ef lf

Estimation matrix complexity simple Size small medium large medium difficult

Analysis: Interview Size # man-days per interview complexity simple medium difficult small 1. 3 1. 8 2. 7 medium 1. 8 2. 7 3. 6 large 2. 7 3. 6 4. 5

Analysis: Data Flows Size # days per technical element complexity simple medium difficult small 0. 2 0. 3 0. 6 medium 0. 3 0. 6 1. 0 large 0. 6 1. 0 1. 5

Analysis: Database design Size # man-days per file complexity simple medium difficult small 1. 0 1. 5 2. 2 medium 1. 5 2. 2 3. 2 large 2. 2 3. 2 4. 5

Analysis: Functional program design complexity # man-days per program Size simple medium difficult small 1. 3 1. 8 2. 7 medium 1. 8 2. 7 3. 6 large 2. 7 3. 6 5. 4

Implementation: coding, testing complexity # man-days per program Size simple medium difficult small 10 15 20 medium 15 20 30 large 20 30 35

Environment corrections • vague or unclear system requirements • additions or modifications accepted • other type of users • real time systems • unclear or complex interfaces with other systems • modifications to other people’s programs • badly defined rules, procedures or standards • ICT-people have no experience with similar projects • system bigger than in previous projects

Environment corrections 2 • system contains legal procedures or regulations • end-user must provide initial database • no choice in project team • end-user must officially accept the system • third party must officially accept the system • end-user has no system development experience • work environment allows easily interruptions • negative expectations concerning the system • negative expectations concerning project team