We prefer to round upwards and convert into hours (for a total of 2 hours). Let’s analyze the component steps in order to estimate the duration for the activity: The correct way to estimate an activity is to define the steps involved, assign the necessary manpower and equipment, and then add a duration (in whole hours) sufficient for its execution.įor example: "UNHEAD EXCHANGER" will require two Boilermakers, one Equipment Operator, one Cherry Picker and an Impact Tool. This will allow you to gradually improve them to arrive at the most realistic estimates that will generate confidence and acceptance of your planning effort.
You will also become aware of whether the estimates are consistently on target, or whether you need to adjust them. As you start estimating, you will gain experience and confidence in your ability. Most estimating know-how is empirical, which means it has been gained through first-hand experience. Or you can use project planning software, which has proven estimating formulas built-in (recommended over the use of a project template).When using a project template you must be careful not to blindly copy previous mistakes (see Refining the Project Planning Process for more on this topic). Unfortunately, such historical records are usually not available, or are incomplete, or are unreliable for a number of reasons. You can use the project file of previous turnaround as a project template, if available.And by asking those who know, you will not only pay them a compliment, but also make their experience and knowledge yours at the same time. It is far worse to make a blunder and be found out. Never be ashamed about revealing a lack of knowledge in an area. You can consult with those in your organization that have estimating experience.There are three ways you can estimate activity durations and the required resources.