Open SE 2 0 Task force Task Force

Open. SE 2. 0 Task force Task Force II : Project Lifecycle and Key deliverables N. Latif, B. Nicquevert, B. Ferreira, E. Peyrat, E. Harrouch, T. Wijnands

Mandate Deliverable : A 20 -min presentation to be given on 11 October a. m. Goals : • Reviewing the Open. SE knowledge domain as featured in the Open. SE booklet, • Discussing the appropriateness w. r. t. projects typologies at CERN, • Discussing the alignment with other standards such as PMBo. K, HERMES, PRINCE 2, . . • Discussing the limitations due to CERN support tools such as EDH, MS Project, CERN templates • Propose improvements (with a rationale), for both the booklet and the Open. SE training material Note: the aim is not to start rewriting the booklet nor to make a new set of training handout slides!

Cost estimating – total cost Sales Price of the project Project Budget BAC from the WBS Management Reserve Risk Responses Overheads Margin or profit Contingency (% BAC or other)

Different types of estimation techniques Analogous technique Parametric technique Bottom up approach

Different types of estimation techniques 1. Analogous technique or Comparative estimating Interpolation or extrapolation of accurate historical data from similar projects Use at the start of the project to estimate BAC Accuracy depends on similarity and experience Relatively fast and easy to produce Less accurate as compared to parametric

Different types of estimation techniques 2. Parametric estimating Mathematical model to predict the cost (tables) Models can be complex Large variation in effort and reliability Reliability depends on Accuracy of historical database Measurability of chosen parameters Scalability (use for small or large projects)

Different types of estimation techniques 3. Bottom up Use workpackage to estimate Accuracy depends on detail of task definition Cost comprises direct and indirect costs HR, raw material, overheads etc Time based on deterministic or probabilistic calculation Cost and accuracy of the estimate are related Cost and accuracy must be balanced against the need of the organisation

Estimating technique PERT M = most likely O = optimistic P = pessimistic (P+4 M+O)/6