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Topics: Cost Management, Estimating, Resource Management, Schedule Management, Scheduling
Estimate Activity Resources
Hello everyone

While estimating activity resources, PMI suggests taking into consideration cost estimate but it ignores time estimates and dependencies. Can someone please elaborate the logic behind this ignorance.

Thanks
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Is not about taking into account times. Is about taking into account availability. To take into account availability resource calendar is needed as input. Dependencies is an input to estimate activity resources because dependencies are recorded into activity attributes. All that is right for version 5. If you take a look in version 6 things changed.
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1 reply by Hassaan Masood
Dec 18, 2017 9:01 PM
Hassaan Masood
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Thank you Sergio. According to Version 5, I was thinking that estimating activity resource should also take into account activity schedule and then check if there is a conflict between this particular activity and any other activity w.r.t. resources. But I think its opposite, as far as I understand your comment. While estimating activity resources, one should consider resource calendar to check if that resource is available or not. And also consider the cost of that resource which will ultimately be the cost of that activity. Is it right!
Hassaan -

Sergio has already addressed dependencies, and imposed dates or other constraints are also considered as part of the activity attributes which serve as an input to Estimate Activity Resources.

Once the resources have been determined, their input (e.g. Expert Judgment, Bottom-Up Estimating) will be used to provide effort estimates which along with the outputs of Estimate Activity Resources can be used to generate duration estimates.

Kiron
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1 reply by Hassaan Masood
Dec 18, 2017 9:05 PM
Hassaan Masood
...
Thank you Kiron. While estimating resources, one should consider resource calendar to check any conflict of resource availability, and not the activity schedule to check for resource availability. Is it right!
It will be like a circle if you decide to consider all of them in planning. Since they impact each other. First, you need to identify the tasks and their dependencies. Then, estimate their required resources and based all of them, estimate the activity duration. In some cases, you can perform the activity faster by adding more resources. However, for the planning purposes, it is going to be a step by step task.
Dec 17, 2017 9:37 PM
Replying to Sergio Luis Conte
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Is not about taking into account times. Is about taking into account availability. To take into account availability resource calendar is needed as input. Dependencies is an input to estimate activity resources because dependencies are recorded into activity attributes. All that is right for version 5. If you take a look in version 6 things changed.
Thank you Sergio. According to Version 5, I was thinking that estimating activity resource should also take into account activity schedule and then check if there is a conflict between this particular activity and any other activity w.r.t. resources. But I think its opposite, as far as I understand your comment. While estimating activity resources, one should consider resource calendar to check if that resource is available or not. And also consider the cost of that resource which will ultimately be the cost of that activity. Is it right!
...
1 reply by Sergio Luis Conte
Dec 19, 2017 5:08 AM
Sergio Luis Conte
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That is the most forgotten thing mainly when people use some tool: they do not create the project/resource calendar first to start working. Calendars will impact into all the estimations. Resource calendars are critical to create mainly when you are working in a multiple project environments. Is the best way to understand projects dependencies including projects that are not under your supervision. But people forgot it. On the other side, sorry if I will be obvious, but remember that in version 5 resources are related any type of resources. That changed in version 6.
Dec 18, 2017 8:08 AM
Replying to Kiron Bondale
...
Hassaan -

Sergio has already addressed dependencies, and imposed dates or other constraints are also considered as part of the activity attributes which serve as an input to Estimate Activity Resources.

Once the resources have been determined, their input (e.g. Expert Judgment, Bottom-Up Estimating) will be used to provide effort estimates which along with the outputs of Estimate Activity Resources can be used to generate duration estimates.

Kiron
Thank you Kiron. While estimating resources, one should consider resource calendar to check any conflict of resource availability, and not the activity schedule to check for resource availability. Is it right!
...
1 reply by Kiron Bondale
Dec 19, 2017 8:23 AM
Kiron Bondale
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Hassaan -

That is correct - this could be for a particular role (e.g. Masons are only available Mondays and Wednesdays) or a named role (e.g. John is taking the next month off for vacation).

Kiron
Dec 18, 2017 9:01 PM
Replying to Hassaan Masood
...
Thank you Sergio. According to Version 5, I was thinking that estimating activity resource should also take into account activity schedule and then check if there is a conflict between this particular activity and any other activity w.r.t. resources. But I think its opposite, as far as I understand your comment. While estimating activity resources, one should consider resource calendar to check if that resource is available or not. And also consider the cost of that resource which will ultimately be the cost of that activity. Is it right!
That is the most forgotten thing mainly when people use some tool: they do not create the project/resource calendar first to start working. Calendars will impact into all the estimations. Resource calendars are critical to create mainly when you are working in a multiple project environments. Is the best way to understand projects dependencies including projects that are not under your supervision. But people forgot it. On the other side, sorry if I will be obvious, but remember that in version 5 resources are related any type of resources. That changed in version 6.
Dec 18, 2017 9:05 PM
Replying to Hassaan Masood
...
Thank you Kiron. While estimating resources, one should consider resource calendar to check any conflict of resource availability, and not the activity schedule to check for resource availability. Is it right!
Hassaan -

That is correct - this could be for a particular role (e.g. Masons are only available Mondays and Wednesdays) or a named role (e.g. John is taking the next month off for vacation).

Kiron

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