Hi everyone,
Couple of months the PMI made free PMP exam, there was a question that seems incomplete,
I’ll share the question and the answer here for you opinions ;
a project manager learns that, due to supplier delays, task I should start 10 days after the start of task H. the project manager produces a network diagram where each task has three day duration, and re evaluates the critical path. what is the new critical path?
• A-B-C-D-E
• H-F-G
• H-C-D-E
• H-I-J
Correct answer: H-I-J
The critical path is the longest path throughout the logical network. In this case it is 10d+ 3d + 3d = 16d
How could the two tasks H&I with start to start relationship and put them in the same path?? Saving Changes...
Without seeing the network diagram it will be pretty difficult to answer the question unless the four paths you have specified represent the only network paths through the project.
Kiron
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1 reply by Ghada Asfour
Jul 06, 2020 9:03 AM
Ghada Asfour
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Thanks for your reply,
Unfortunately, there is no other details only the question and without the network diagram.
Saving Changes...
Ghada AsfourRiyadh, Saudi Arabia / Riyadh Region /Ri, Saudi Arabia
Jul 06, 2020 7:49 AM
Replying to Kiron Bondale
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Without seeing the network diagram it will be pretty difficult to answer the question unless the four paths you have specified represent the only network paths through the project.
Kiron
Thanks for your reply,
Unfortunately, there is no other details only the question and without the network diagram. Saving Changes...
Thomas WalentaGlobal Project Economy ExpertHackenheim, Germany
Ghada,
every defined relationship between 2 tasks is part of one or more paths, also H-I. Type of relationship does not matter (FS, SS, SF, FF).
Thomas
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1 reply by Ghada Asfour
Jul 06, 2020 1:23 PM
Ghada Asfour
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But if the relationship between the two activities is SS or FF , they will not be in the same path.
It's not incomplete. In fact they gave you significant extra information. The critical path requires both H and I. None of the other tasks are even mentioned.
The only choice that contains "I" is H-I-J. Without even knowing that there is a task J, you can rule out all answers that do not include "I" in the answer.
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1 reply by Ghada Asfour
Jul 06, 2020 1:21 PM
Ghada Asfour
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How could be two activities with start to start relationship and be in the same path?
Saving Changes...
Ghada AsfourRiyadh, Saudi Arabia / Riyadh Region /Ri, Saudi Arabia
Jul 06, 2020 12:27 PM
Replying to Keith Novak
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It's not incomplete. In fact they gave you significant extra information. The critical path requires both H and I. None of the other tasks are even mentioned.
The only choice that contains "I" is H-I-J. Without even knowing that there is a task J, you can rule out all answers that do not include "I" in the answer.
How could be two activities with start to start relationship and be in the same path?
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1 reply by Keith Novak
Jul 06, 2020 1:52 PM
Keith Novak
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Here is an example: The critical path includes completion of some deliverable. I am responsible for providing a deliverable and you are responsible for reviewing prior to completion. I don't need to complete everything before you start your review, but you can't start your review before I've started creating the deliverable.
That is a classic start to start relationship, and both are on the critical path.
Saving Changes...
Ghada AsfourRiyadh, Saudi Arabia / Riyadh Region /Ri, Saudi Arabia
Jul 06, 2020 12:11 PM
Replying to Thomas Walenta
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Ghada,
every defined relationship between 2 tasks is part of one or more paths, also H-I. Type of relationship does not matter (FS, SS, SF, FF).
Thomas
But if the relationship between the two activities is SS or FF , they will not be in the same path.
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1 reply by Thomas Walenta
Jul 07, 2020 9:56 PM
Thomas Walenta
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What is the definition of a path?
Any sequence of tasks from start to end, regardless of the type of sequence. There are 4 types.
How could be two activities with start to start relationship and be in the same path?
Here is an example: The critical path includes completion of some deliverable. I am responsible for providing a deliverable and you are responsible for reviewing prior to completion. I don't need to complete everything before you start your review, but you can't start your review before I've started creating the deliverable.
That is a classic start to start relationship, and both are on the critical path.
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1 reply by Ghada Asfour
Jul 06, 2020 2:19 PM
Ghada Asfour
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So I will add the activity I duration with the lag and the duration for J neglecting H duration
Saving Changes...
Ghada AsfourRiyadh, Saudi Arabia / Riyadh Region /Ri, Saudi Arabia
Jul 06, 2020 1:52 PM
Replying to Keith Novak
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Here is an example: The critical path includes completion of some deliverable. I am responsible for providing a deliverable and you are responsible for reviewing prior to completion. I don't need to complete everything before you start your review, but you can't start your review before I've started creating the deliverable.
That is a classic start to start relationship, and both are on the critical path.
So I will add the activity I duration with the lag and the duration for J neglecting H duration
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1 reply by Keith Novak
Jul 06, 2020 2:57 PM
Keith Novak
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You didn't provide the duration of the tasks. Your addition shows 2 activities and 1 lag, but there are 3 activities. (edit: I didn't see that all tasks have 3 days duration)
If the question is about what items are on the critical path as stated, then you have only one possible answer because H and I must be included. If the question is about how long is the critical path, you need the duration and dependencies of all 3 tasks, and you lack sufficient information. J can start at any time if there are no dependencies.
So I will add the activity I duration with the lag and the duration for J neglecting H duration
You didn't provide the duration of the tasks. Your addition shows 2 activities and 1 lag, but there are 3 activities. (edit: I didn't see that all tasks have 3 days duration)
If the question is about what items are on the critical path as stated, then you have only one possible answer because H and I must be included. If the question is about how long is the critical path, you need the duration and dependencies of all 3 tasks, and you lack sufficient information. J can start at any time if there are no dependencies.
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1 reply by Ghada Asfour
Jul 06, 2020 3:56 PM
Ghada Asfour
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I included the answer as it is.
This is the correct answer according to the pmi since this exam was sent by the pmi as a free practice exam.
The question and the answer as it is written
Saving Changes...
Vladimir LiberzonR&D Director| Spider Project TeamMoscow, Russian Federation
I understood that all relationships do not have any lags except the dependency between H and I that is SS+10 days.
So the duration of H-I-J path is 16 days and maximal duration of other paths is 15 days (if all dependencies are FS).
So path H-I-J is critical.
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1 reply by Ghada Asfour
Jul 06, 2020 3:54 PM
Ghada Asfour
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This is the point ; you didn’t include duration for activity H since it is SS with activity I...
