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Monthly Archives: March 2017

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Schedule Estimating Threshold

Schedule Estimating Threshold

When you create a schedule you generally don’t know enough to enter all of the detailed activities the first time though. Instead, you identify large chunks of work first, and then break the larger chunks into smaller pieces. These smaller pieces are, in turn, broken down into still smaller and more discrete activities. This technique is referred to as creating a Work Breakdown Structure (WBS).

A question people ask is how small the activities should be before they do not need to be broken down further. This is referred to as your “estimating threshold”. Work can be broken down into smaller activities than the estimating threshold, but normally no work would be left at a higher level. The threshold can be different based on the size of your project and how well the work is understood.

You can use the following criteria as a guide. For a typical large project (say 5000 effort hours or more) the activities should be no longer than two weeks. Medium and small projects (say 1000 effort hours or less) should have activities no larger than one week. Remember that this threshold is an upper limit. You can break the activities down further if you want.

Assigning work that is smaller than your threshold allows the work to be more manageable. Think about it. When you assign work to a team member you don’t know for sure how he is progressing until the due date (or the completion date if it comes first). (Yes, you can track progress if the work proceeds linearly – like painting a wall. But many of us work in the knowledge business (IT, Sales, Finance) and it is not easy to know exactly how the work is progressing.)

Let’s look at an example. If you assign a team member work that is due in four weeks, you are not going to know for sure whether the work is on time until the four-week deadline. The worker may tell you things are on track, but you don’t really know for sure until the due date. If the work is completed you will know you are on track. If the work is late you will know it then as well. However, four weeks (or longer) is too long to wait to know if the work is on track. A better approach is to break the four-week activity into four one-week activities. Then you will know after the first week if the work is on time or not.

If at all possible you want to try to have schedule work completed within two weeks. If you give someone work that takes four weeks or longer there is just too much time before you really know if things are on-track or not. It is much better for you if you can keep the schedule feedback loop to no more than two weeks.

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Assumptions and Risks – Two Sides of a Coin

Assumptions and Risks – Two Sides of a Coin

Let’s take an example of a common statement that is included in many Project Definitions – that the resources needed for this project will be available when needed. What kind of a statement is this? Most people would say it is an assumption. After all, when a project starts, you always assume you will get the resources you need.

However, is it really an assumption? Can you imagine starting a project where the people and equipment were not available and there was a realistic possibility that they would not be ready when you need them – perhaps because another project needed to finish first? It is not too difficult to imagine that scenario. In that case, the same statement would definitely be a risk – not an assumption.

The same statement might be an assumption or a risk depending on the circumstances of your particular project. There is some degree of uncertainty to an assumption. If the event is negative and there is a low probability that it will happen, it can be stated as an assumption. If the event is positive and there is a high likelihood it will happen, it is also an assumption. One way to identify important assumptions is to perform a risk assessment and look at all the low-risk items. Most of these low risks are not worth mentioning, but some will have significant implications if events do not turn out as you think. These are the ones that you can document as assumptions.

There are two key characteristics of risks and assumptions. First, there must be some uncertainty to the event. If there is 100% chance of an event occurring, it is simply a fact. If there is a 0% chance of the event occurring, it is fiction. Neither are risks or assumptions.

Second, assumptions and risks are both outside the total control of the project team. If the event is within the control of the project team it is neither an assumption nor a risk. It should simply be managed to make it happen.

Review the following examples for more clarity on assumptions and risks.

Statement

Assumption, Risk or Other?

We will have strong support for this initiative from our executive sponsor. Can’t tell if it a risk or an assumption. Depending on the project, there could be a high degree of risk in this statement (risk) or very little (assumption).
We will complete requirements before we begin design work. This is part of the project approach. It is not a risk or assumption because it is within the control of the project team.
Our vendor will complete their installation by October 1 Can’t tell if it a risk or an assumption. Depending on the project, there could be a high degree of risk in this statement (risk) or very little (assumption).
We must go to the moon to get the supply of meteor fragments that this project requires. This is not a risk or assumption because there is no risk involved. It is a fiction (0% true).
It is 60 miles from one project team location to the other. This is not a risk or assumption because there is no risk involved. It is a fact (100% true). (If it were not true it would be a fiction (0% true), but it would still not be an assumption or risk statement.)