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Why "Approved change requests" are not inputs of Scope and Schedule Control ?

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Alexandre Filipiak Rose-Hill, Plaine Wilhems, Mauritius
Hello,

I hope this question is not too basic. I'm still studying the PMBOK.

But as for now, I still can't understand why the "Approved change requests" are not inputs of Scope and Schedule Control ?

In fact, I'm not quite sure also if the update to documents related to the "approved change requests" are performed inside "Perform integrated change control" or Control Scope or Control Schedule.

Thanks for your answers :)

Alexandre
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Alexandre Filipiak Rose-Hill, Plaine Wilhems, Mauritius
@Sergio : for information, in the Head First PMP manual, they say that we have "change requests" in output of "Control Scope" because a change can lead to another change.
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1 reply by Sergio Luis Conte
Apr 21, 2019 10:11 AM
Sergio Luis Conte
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I do not know that manual. But that is not right if I understand the point. When you implement a change by changing an impacted deliverable (for example, changing the scope statement document) the next step is to validate if the change was correctly implemented. Where you do that? Performing Control Quality. So, if the change was not corectly implemented then a new change request my be rised as an output of Control Quality process.
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Sergio Luis Conte Helping to create solutions for everyone| Worldwide based Organizations Buenos Aires, Argentina
Apr 21, 2019 9:18 AM
Replying to Alexandre Filipiak
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@Sergio : for information, in the Head First PMP manual, they say that we have "change requests" in output of "Control Scope" because a change can lead to another change.
I do not know that manual. But that is not right if I understand the point. When you implement a change by changing an impacted deliverable (for example, changing the scope statement document) the next step is to validate if the change was correctly implemented. Where you do that? Performing Control Quality. So, if the change was not corectly implemented then a new change request my be rised as an output of Control Quality process.
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Thomas Walenta Global Project Economy Expert Hackenheim, Germany
Apr 21, 2019 9:15 AM
Replying to Alexandre Filipiak
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Thanks for your anwsers !

@Sergio : why then do we have scope baseline / schedule baseline and cost baseline as an output of "Control Scope" ? Are they not changed by the "Control Scope" process ?

@Thomas : so do you mean that when the team receives the approved changes in the process "Direct and Manage work", the approved changes are not yet modified in the baseline included in the project management plan ?
Alexandre,
do not see that PMBoK gives a sequence, updating the baselines could be done in parallel to actually implementing the changes. Some projects update plans in a fixed rhythm, like agile sprints at the start of each sprint, while a change might be time-sensitive and has to be implemented immediately.
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Thomas Walenta Global Project Economy Expert Hackenheim, Germany
Happy Easter to you all!

Alexandre, you were right, I looked it up.
The actual update of baselines is performed during the control scope process. Explicitly stated on PMBoK p. 167.
I find this strange for several reasons, but it is what it is.

Still, the implementation is done thru direct and manage project work and is confirmed thru control quality.
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Sergio Luis Conte Helping to create solutions for everyone| Worldwide based Organizations Buenos Aires, Argentina
Sorry, but is not correct thatn changes are procesed in Control Scope. The only documents updated are lessons learned, requirements documentation, requirements trazability matrix. You can see that approved change request are not input to the Control Scope process. The key is understanding 5.6.3.3 PROJECT MANAGEMENT PLAN UPDATES
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Keith Novak Tukwila, Wa, United States
Here would be an easier answer...

In 5.6 Control Scope, inputs include the configuration management plan (how we manage change and approve the change requests) and Project Documents which although not explicitly listed in that section, change request approvals are one of the many types of project documents. If you look at 4.6 Perform Integrated Change Control. Process documents are both an input and an output thus they are changed by the change control process.

The PMBoK doesn't always list every possible input to a process explicitly, unless it is fundamental to the process. Not all changes affect scope, for example correcting a typo might require an administrative change only, but still requires approval due to the configuration management process.
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Thomas Walenta Global Project Economy Expert Hackenheim, Germany
PMBoK control process 1st sentence is (same for ed 6 and ed 5):

Control scope is the process of monitoring the status of the project and product scope AND managing changes to the scope baseline.
Outputs of this process are updates to ALL baselines and the requirements traceability matrix.
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Joseph Pangan Senior Principal Consultant| Genpact Philippines Angeles City, Philippines, Philippines
The project management plan is progressively elaborated.
Approved change requests are inputs to the development and elaboration of the project management plan
Approved change requests may change the project management plan components such as the scope, cost and schedule baselines (the triple constraints) or any other component of the project management plan.

The project management plan is an input of the scope and schedule control processes.
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Alexandre Filipiak Rose-Hill, Plaine Wilhems, Mauritius
@Thomas : Good point. Actually, I don't mind that it is made in parallel with implementation. I was simply wondering in which process the baseline change is done for a change which has "Control Scope" as origin.
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1 reply by Sergio Luis Conte
Apr 22, 2019 7:26 AM
Sergio Luis Conte
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Alexander: PMBOK does not follow a projecess life cycle. So, if you are studying for the PMP exam then my recommendation is not fall in the trap. What you are doing here is great because the key to approve the exam is to understand where you are into each situation stated by the exam question. So, if in parellel or not, is up to you the day you have to create/use the project life cycle model that best fits for your initiative. But it is not about the PMBOK.
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Sergio Luis Conte Helping to create solutions for everyone| Worldwide based Organizations Buenos Aires, Argentina
Thomas, now I undestand your point. My previous comments were all related to the original question. So, to recap from my side. The only places where change request are processed are those where approved change request are inputs. BUT indeed, as you mentioned, baselines are updated if applies because normal updates not for change request in other places. For example, Control Scope.
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