Methods and tools_of_success_driven_project_management
- 1. Vladimir Liberzon, PMP Victoria Shavyrina, PMP Methods and Tools of Success Driven Project Management
- 2. Introduction Advanced project management methodology called Success Driven Project Management integrates scope, time, cost and risk management suggesting reliable tools for project planning and performance management. Success Driven Project Management (SDPM) is project management and performance analysis methodology developed in Russia in 90‐s and since then successfully used in many projects, programs, and organizations in Russia, East Europe and Brazil. SDPM is supported by Russian PM software Spider Project but its basic approaches can be used with other PM software tools.
- 3. SDPM Ideas z Triple constraint and multiple project success criteria make project management too complicated. There is a need in the single and integrated project success criterion. z Single project schedule and budget for all project stakeholders leads to project failure. There is a need for setting different targets for project work force, for project management team, and project sponsor.
- 4. z Project schedule and budget for project team members shall be optimistic (no reserves included), project targets (scope, time, cost) for project management team shall include contingency reserves, project sponsor targets shall include management reserves for unknown unknowns. Thus project management team shall have time and cost buffers for managing project risks and uncertainties. These buffers are not connected with any activity sequence. Project buffer is a difference between target value and the value for the same parameter in the optimistic schedule. SDPM Ideas
- 5. z Targets shall be set using risk simulation. These targets shall have reasonable probabilities to be met. Risk simulation shall calculate necessary project cost and time buffers. z Project status information is useful but not sufficient for decision making. Decision making shall be based on the analysis of project trends. SDPM Ideas
- 6. z Project buffers will be consumed during project performance. Project management is about managing these buffers. If they will remain positive to the moment of project finish then project management was successful and the targets were reached. z There is a need to have tools for measuring project buffer penetration and project performance analysis. The best indicator of buffer penetration and project performance status is current probability to meet project target. SDPM Ideas
- 7. z If the probability to meet project target is rising then project buffer was consumed slower than expected, in other case project buffer was consumed too fast and project success is endangered. z Success probability trends are the best integrated performance indicators – they take into consideration project risks, they depend not only on performance results but also on the project environment. SDPM Ideas
- 8. SDPM & Critical Chain z SDPM has some common features with Critical Chain project management but there also many differences that will be discussed after we will consider an application of SDPM step by step.
- 9. Step 1 – Define integrated project success criterion z If project success criteria are set as finishing project on time and under budget then proper decision making will be complicated. z For example, project managers will not be able to estimate if their decisions to spend more money and finish the project earlier are reasonable. z We suggest to set one integrated criterion of the project/program success or failure.
- 10. Step 1 – Define integrated project success criterion z One of the potential approaches is to use money for measurement of everything. z For example defining the cost of one day for project acceleration and delay we will be able to estimate if it is profitable to pay more for faster performance and if project performance was successful if it was late but saved certain amount of money. z Other weighting factors may be also used.
- 11. Step 2 Create optimistic project schedule model z Optimistic model is based on optimistic estimates of all project parameters and includes only most probable (90% probability or larger) risk events. z This model is used for setting performance targets for project workforce. z It is clear that optimistic targets will not be achieved but in any case performance targets shall not include contingency reserves or they will be lost (Parkinson Law).
- 12. Step 3 Simulate risks and set reliable targets for project management team z Project management team shall have time and cost buffers for managing project risks and uncertainties. Project or phase buffer is a difference between target value and the value for the same parameter in the optimistic schedule. z Targets shall be set using risk simulation. These targets shall have reasonable probabilities to be met (usually in 70‐80% probability range).
- 13. Step 3 Simulate risks and set reliable targets for project management team z Project and phase targets and buffers may be created not only for integrated project success criterion but also for other parameters like project cost and duration. z Probabilities to meet project/phase targets are called success probabilities.
- 14. Step 4 Set project sponsor targets z Management reserve for unknown unknowns is usually created basing on past performance data. When these data are not reliable project sponsor targets are set using the same risk simulation model but with higher probability to be achieved. z So project has a set of targets – tight targets for project team, reasonable targets for project management team that include sufficient contingency reserves, and more comfortable targets for project sponsor that include additional management reserves.
- 15. Step 5 Estimate buffer penetrations z It is natural that project will be late to optimistic schedule and project/phase buffers will be penetrated in the process of project execution. z It is necessary to be able to estimate if these buffers are still sufficient and if project performance was better or worse than expected. z The natural way for estimating buffer penetrations is calculation of current probabilities to meet the targets.
- 16. Step 5 Estimate buffer penetrations z If new probabilities are higher than initial project performance was better than expected though success probabilities depend not only on internal factors. z If project performance was perfect but new negative risks were identified or happened success probability may become lower because initial contingency reserves did not consider these new risks.
- 17. Step 6 Analyze success probability trends z If the probability to meet project target is rising then project buffer was consumed slower than expected, in other case project buffer was consumed too fast and project success is endangered. z Management decisions shall be based on the trend analysis. Even if current status is good (success probability is high) but the trend is negative corrective actions shall be considered.
- 18. Step 6 Analyze success probability trends z Success probability trends are the best integrated performance indicators – they take into account project risks, they depend not only on performance results but also on the project environment changes.
- 19. Setting project targets with risk simulation z Traditional approach to risk simulation utilizes Monte Carlo simulation. Proper Monte Carlo simulation requires a lot of time. Usually necessary time is not available and people are satisfied if the results are “good enough”. z We prefer 3 scenarios approaches for the reasons explained further.
- 21. Setting project targets with risk simulation z Monte Carlo means Accuracy but lack of Precision. Precision may be achieved by very large number of iterations but for large scale projects the time needed is too large. z Three scenarios means Precision but lack of Accuracy. A bias in estimating success probability is systematic.
- 22. Setting project targets with risk simulation z The choice depends on management approach. Our approach may be called “Management by Trends”. Applying Trend Analysis we rely on data precision. z We think that trends supply management with most valuable information on project performance. Trend analysis helps to discover performance problems ASAP and to apply corrective actions if necessary. z In any case we need Optimistic schedule and budget for project performance management.
- 23. Three scenarios approach Three scenarios approach to Risk Simulation includes following steps: z A project planner obtains three estimates for all initial data and creates optimistic, most probable and pessimistic scenarios of project performance. z Risk events are selected and ranked using the usual approach to risk qualitative analysis. z Most probable and pessimistic project scenarios may contain additional activities and costs due to corresponding risk events and may employ additional resources and different calendars.
- 24. z As the result project planner obtains three expected finish dates, costs and material consumptions for all project phases and the project as a whole. z They are used to rebuild probability curves for the dates, costs and material requirements. z Required probability to meet project target defines the target that shall be set. Three scenarios approach
- 25. z Target dates do not belong to any schedule. Usually they are between most probable and pessimistic dates. z A set of target dates and costs for project phases (analogue of milestone schedule) is the real project baseline. But baseline schedule does not exist! z It means that application of usual project performance measurement approaches (like Earned Value Analysis) is complicated. Three scenarios approach
- 26. The difference between start and finish dates in current and critical schedules we call start and finish time buffers (contingency reserves). The difference between activity (phase) cost that has defined probability to be met and optimistic cost of the same activity (phase) we call cost buffer. Critical Schedule Critical schedule is calculated backward from the target dates with most probable estimates of activity durations.
- 27. z We recommend to manage projects and portfolios basing on the analysis of performance trends. z Trend analysis shows short term performance results and helps to make timely management decisions. z Usually project management team analyzes trends of main project parameters like duration, cost, and profit. Project Performance Management
- 28. Earned Value Analysis is another method that is used for estimating program/project performance. But this method shall be used very carefully and only in combination with other methods because: z the real situation may be distorted, z project managers are motivated to do expensive jobs ASAP and low cost jobs ALAP, z it does not consider if activities that were performed were critical or not, z it does not consider project risks. Project Performance Management
- 29. z We consider success probability trends as the really integrated project performance indicators. z Success probabilities may change due to: 9 Performance results 9 Scope changes 9 Cost changes 9 Risk changes 9 Resource changes Thus success probability trends reflect not only project performance results but also what happens around the project. Project Performance Management
- 31. z Both SDPM and CCPM suggest to set tight schedule for project work force and create and manage project time buffer. z Both methods suggest to prioritize projects managing project portfolios. z But there are also many differences described below. Success Driven Project Management and Critical Chain Project Management
- 32. CCPM suggests to use 50% probability estimates for Critical Chain schedule development. But using 50% probable estimates still means that there are some reserves and these reserves will be lost due to Parkinson Law. SDPM suggests to use optimistic estimates in the schedule that is used for project work force management. SDPM & CCPM Working Schedule
- 33. CCPM suggests to estimate excessive contingency reserves that people added to most probable activity duration estimates, take them away, summarize and put in a dummy activity that is called Project Buffer and follows the last activity of the Critical Chain. SDPM uses risk simulation for setting reliable targets and project time buffer is the difference between project optimistic and target durations. Project time buffer does not belong to any chain. SDPM & CCPM Project Buffers
- 34. Besides, SDPM suggests to set targets for project costs, materials, and integrated success criterion. Cost Buffers, Material Buffers and Project Success Criterion Buffer are managed together with Time Buffers. SDPM & CCPM Project Buffers
- 35. CCPM suggests to create feeding buffers on activity paths that precede Critical Chain activities to protect Critical Chain. CCPM proposes that Critical Chain shall never change. SDPM does not protect any chain – project schedule is regularly recalculated and risks analyzed. Change of Resource Critical Path during project execution is usual. Besides Resource Critical Paths in optimistic, most probable and pessimistic schedules may be different. SDPM & CCPM Critical Chain Protection
- 36. CCPM suggests to “pipeline” projects in the portfolio (to perform them one after another) to avoid multitasking. SDPM suggests almost the same – always apply priorities to the portfolio projects when calculating portfolio schedule. But if resources are available they may be used in the projects with lower priorities. Besides there are special cases when multitasking is useful. SDPM & CCPM Portfolio Planning
- 37. CCPM suggests only qualitative methods for estimating buffer penetrations. Dividing buffer into green, yellow, and red zones is one of them. Entering yellow zone means an alert, red zone penetration requires considering corrective actions. SDPM estimates buffer penetrations by success probability trends. If the trend is negative then project buffer is consumed faster than expected. If in the middle of the project execution project buffer is half consumed it may mean excellent performance if most risks are behind and poor performance if most risks are ahead. SDPM & CCPM Buffer Penetration Estimation
- 38. Success Driven Project Management is powerful methodology that provides project managers with reliable tools for integrated scope, time, cost and risk management. It includes risk planning and simulation for setting reliable project targets and selecting optimistic estimates for creating working schedules and budgets. The differences between target and scheduled finish dates, between target and optimistic project cost are called time and cost buffers. Conclusions
- 41. Thank You For Attending! Vladimir Liberzon spider@mail.cnt.ru