Top Down estimating is a project estimating technique whereby the overall project is estimated first, and individual tasks are apportioned from it. You start from the top of the pyramid and work downwards. This type of project budgeting usually occurs when there is a fixed budget and/or the scope of the project must fit within a predetermined funding level, … [Read more...]
Mismanaging project costs is the single fastest way to cause project failure. Project costs represent the many multi-faceted experiences that occur on a project, however stakeholders see only the bottom line and draw rapid conclusions from it. For this reason, the planning of the management of project costs is the focus of the Project Management Body of Knowledge's … [Read more...]
Keeping project costs under control can feel like swimming against the current sometimes. To prevent you from going up the creek without a paddle, a Cost Management Plan is the guiding document which allows you to take fast, decisive action when issues arise and the sharks are circling. The Project Cost Management Plan is the component of the overall Project … [Read more...]
Almost every project requires an estimate. Since a project is, by definition, temporary, somebody must approve a budget for it. Which means they must know how much to approve. The available types of estimates can be categorized into the following groups: Accuracy Source of Data Estimating techniques Accuracy In many industries, project estimates start … [Read more...]
Project estimating requires predicting the future. Like ancient prophets and soothsayers, today's project managers are experts in telling people what is going to happen. The key to success, then, is to ensure that what actually happens is the same as the estimate. This might seem like magic sometimes, but it requires strong project cost estimation techniques. Project … [Read more...]
Three point estimating is a technique which utilizes an optimistic and pessimistic estimate to determine the ideal estimate value for a project task. It is a shoe-in for PMP exam questions, which is not likely to change anytime soon. It allows known risks to be quantified and built in to the project budget. Formula There are two generally accepted formulas for three … [Read more...]
Parametric estimating is a guaranteed inclusion on the PMP Exam. This article is assured to give you at least one point (but more likely four or five). Parametric estimating is a project estimation technique whereby a unit rate is used and multiplied by the number of units. For example: A house building project is estimated at $120 per square foot A contractor … [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...]
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...]
