Activity dependencies
During a simple home repair project, Eva is planning on putting two coats of paint on her dining room. After the second coat of paint dries, she intends to hang up a picture of her family in the room. The activity relationships described in this example are known as:
A. Soft logic
B. Lag
C. Mandatory dependencies
D. Critical path
Answer: C. Mandatory dependencies
When you have activities that inherently require other activities to be completed, they are called mandatory dependencies, or hard logic. Discretionary dependencies, or soft logic, allow some flexibility and is based on preference. In this example, Eva must finish her first coat of paint before applying the second coat of paint. Then she must wait for the second coat of paint to dry before she can hang up her picture; she does not have any flexibility on the dependencies.
Sequence Activities process
As a senior project manager, Jim is asked to review the work of other project managers in the organization. Wendy, a fairly new project manager, is working with her team to sequence activities. One thing Jim should ensure is that Wendy has already performed the __________ process.
A. Develop Schedule
B. Estimate Activity Resources
C. Define Activities
D. Estimate Activity Durations
Answer: C. Define Activities
Although all of the choices are time management processes, only the Define Activities process precedes the Sequence Activities process. The primary output of Define Activities is an activity list, which a project manager must obviously have in order to sequence activities.
Activity sequencing, part II
The intern who will be verifying address labels will not be able to check them until they have obviously been printed. However, you recognize that she does not have to wait until all of the labels have been printed; rather she can begin shortly after the printing of the labels begin. This is an example of:
A. Finish-to-start
B. Finish-to-finish
C. Start-to-start
D. Start-to-finish
Answer: C. Start-to-start
The start of successor is determined by the start of the predecessor. Translation: when labels start printing out, the intern can start verifying them. You may even add a little lag (i.e. delay) if you wish.
Activity sequencing, part I
You are planning a series of programming tasks and you know that your quality engineers will be testing the code after the programmers have completed the code. This is an example of:
A. Finish-to-start
B. Finish-to-finish
C. Start-to-start
D. Start-to-finish
Answer: A. Finish-to-start
In this example, programmers must complete the code before the testing begins. As a result, there is a finish-to-start relationship. The predecessor determines when the successor can begin, in other words, the testing cannot start until the programmers have finished the code.
Lag or lead? Critical path or non-critical path?
Although you got your project schedule approved prior to starting it, your client just moved the target finish date up two days. In order to finish the project two days earlier, which of the following can you apply?
A. Add two days of lag to the critical path
B. Add two days of lag to a non-critical path
C. Add two days of lead to the critical path
D. Add two days of lead to a non-critical path
Answer: C. Add two days of lead to the critical path
Lag is a forced waiting period and therefore, would push the project out. Adding lead, also known as negative lag, would do the opposite — overlap related tasks, which is what you will need to do in this example to finish sooner. However, only adding lead to the critical path would affect the end date. Although you can add lead anywhere, putting it on a non-critical path would not allow you to finish any sooner.
Critical path, show us the way
After making a small change to your project schedule, you realize now that you have two critical paths. Therefore, the project:
A. Will cost less
B. Must be modified to allow only one critical path
C. Has increased risk
D. Cannot be accomplished
Answer: C. Has increased risk
A critical path is the longest path (and the shortest amount of time possible) it takes to complete the project. If you have two critical paths, that means you have less flexibility in your schedule. As a result, you have increased risk. You can actually have as many critical paths as necessary but of course, the more you have the riskier the project becomes.
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