Analogous estimating uses the actual data from a previous project as the basis for estimating the current project. For example, the previous fence cost $75/foot therefore this one should cost about $100/foot. Many different variables can be compared, such as: scope cost budget duration Measures of scale: Size, weight, length, etc. Work units: … [Read more...]
In 1986, the NASA Space Shuttle Challenger exploded spectacularly upon take-off in front of one of the largest live TV audiences in history (to that time). The investigation concluded that several tiny O-rings that sealed the rocket booster to the fuel supply failed. These O-rings were about 1 foot in diameter. Just like the tiny O-rings were able to bring down the … [Read more...]
Project scheduling is to a project manager like landing an airplane is to a pilot. It is often the largest and most visible aspect of project management. In this article, I will develop a professional, resource levelled project schedule that provides tremendous confidence in the ability to meet the project deadline. First, let's deal with the theoretical foundation. … [Read more...]
Bottom up estimating is the project management technique of estimating individual tasks and then combining them into an overall project estimate. Often the individual project team members who will be performing the task provide the estimates, because they are in a better position to estimate a task that they will be working on. Types of Estimates Any of the three main … [Read more...]
Once the project has been divided into tasks and resources assigned to those tasks, the next step is to determine the task durations. This may seem trivial, but its importance cannot be understated because these durations will be used to construct the project schedule. Just like the tiny O-rings that brought down the space shuttle Challenger, one small underestimation … [Read more...]
Once the tasks within the project have been defined, the resources required by each task must be determined. To do this, we consult the PMBOK's Estimate Activity Resources process. PMBOK, 5th Edition, Section 6.4, "Estimate Activity Resources" Estimate Activity Resources is the process of estimating the type and quantities of material, human resources, equipment, … [Read more...]
