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Types of Durations in P3ec

4 replies [Last post]
Thu, 2007-09-13 22:46
Jagathnarayanan A...
User offline. Last seen 11 years 16 weeks ago. Offline
Joined: 14 Jun 2006
Posts: 17
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Hi, good day to all,

I was thinking if any one has some examples as to how we can use the different types of durations in P3ec and how P3ec will act when updating.

Please let me know
Best regards
Angyan
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Replies

Fri, 2007-09-14 09:14
#1
Suresh Sankaranku...
User offline. Last seen 5 years 11 weeks ago. Offline
Joined: 30 Jul 2006
Posts: 77
Groups: Petro-Chem / Oil & Gas
Choose Fixed Units/Time if you want the resource units per time to remain constant when the activity duration or units change. This type is used when an activity has fixed resources with fixed productivity output per timeperiod. Choose this duration type when you are using resource dependent activities.


Choose Fixed Duration & Units/Time if you want the activity duration to remain constant and the remaining units to change. This type is used when the activity is to be completed within a fixed timeperiod regardless of the resources assigned. You most often choose this duration type when you are using task dependent activities.

Choose Fixed Units if you want the activity units to remain constant when the duration or resource units per time change. This type is used when the total amount of work is fixed, and increasing the resources can decrease the activity duration. You most often choose this duration type when you are using resource dependent activities.

Choose Fixed Duration & Units if you want the activity duration to remain constant and the units/time to change. This type is used when the activity is to be completed within a fixed timeperiod and the the total amount of work is fixed. You most often choose this duration type when you are using task dependent activities.

Is it helped you ?

Regards
Suresh
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Fri, 2007-09-14 09:06
#2
Paul Harris
User offline. Last seen 1 year 31 weeks ago. Offline
Joined: 11 Apr 2001
Posts: 618
Groups: Content Moderators, GPCCAR Editors
Here is some text from my book:

Duration Type

Fixed Units/Time
This option is used when the same number of people are required to complete an activity irrespective of the activity duration.
For example, if a machine requires two people to operate and therefore a Resource is assigned to the Activity at 200%, changing either the Units or the Duration will not change the Units/Time and there will always be two people operating the machine.

Fixed Duration & Units/Time
This Duration Type disables the User Preferences, Calculations tab option Recalculate the Units, Duration, and Units/Time for existing assignments based on the activity Duration Type.
Option 1
This option is used when the Duration of an activity should not change when Resources are added or removed or Units/Time changed.
For example, when the time to complete an activity is fixed, the resources may be manipulated until a satisfactory resource loading is established without the activity duration changing.
Option 2
A change in the Duration will change the Units; however, the Units/Time will remain constant.
For example, when there are two people assigned to an activity and the activity is increased in duration, there will still be two people working but for a longer period of time.

Fixed Units
This option is used when the amount of work required to finish an activity is constant.
For example, if there are 8,000 bricks to be laid and a bricklayer is able to lay 100 bricks per hour, there is 80 hours of work for one bricklayer, 40 hours for 2 bricklayers and 20 hours for 4 bricklayers. Changing the Duration or the Units/Time will not change the number of hours required to complete the activity.

Fixed Duration & Units
Option 1
This option is used when the Duration of an activity should not change when Resources are added or removed or Units/Time changed.
For example, when the time to complete an activity is fixed, the resources may be manipulated until a satisfactory resource loading is established without the activity duration changing.
Option 2
A change to the Duration will change the Units; however, the Units/Time will remain constant.
It one person is assigned to an activity for 8 hours per day and the activity is doubled in duration, the will be now be one person working on the activity for 4 hours per day and the activity will require the same number of hours to complete.

Paul E Harris
Eastwood Harris Pty Ltd, Melbourne, Australia
Planning and Scheduling Training Manual & Book Publishers & Consulting
www.eh.com.au
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Fri, 2007-09-14 08:37
#3
Jagathnarayanan A...
User offline. Last seen 11 years 16 weeks ago. Offline
Joined: 14 Jun 2006
Posts: 17
Groups: None
Suresh,

It is OK and thanks but what I am looking for is the Duration Type as given in P3ec (Fixed Duration & unit or Fixed units or Fixed Duration & Unit/time).

Please if any one can explain how to use each with an example it will help.

Regards
Angyan
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Fri, 2007-09-14 08:28
#4
Suresh Sankaranku...
User offline. Last seen 5 years 11 weeks ago. Offline
Joined: 30 Jul 2006
Posts: 77
Groups: Petro-Chem / Oil & Gas

Original Duration
Actual Duration
At Completion Duration
Remaining Duration



ORIGINAL DURATION :- The Amount of Time followed by the timeperiod. (This is the duration which you assume to complete a job)

ACTUAL DURATION : The amount of time you get after the completion of an activity. (The time taken to complete an activity)

REMAINING DURATION : The duration left for an activiy which is in progress

AT COMPLETION DURATION : This is tie-up with Actual Units . The completion duration keeps going change as you enter the actual man hours.

Eg: Budgeted Units - 20 hrs
Actual Units - 10 hrs
Remaining Units - 10 hrs


Means At completion duration will be - 20hrs
If you enter Actual Units -10hrs
Remaining units - 20 hrs

then the original duration will be 20 hrs and completion duraion will be 30 hrs

Inshort, If the Acutal Units is more than the budgeted units, then the at completion duration will be higher than the original duration.

We need to concentrate only on either Units or Duration


Usually we use Original Duration only.

Hope it helped you.

Regards
Suresh
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