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Thumb rules to assing the resources

18 replies [Last post]
Wed, 2009-01-28 07:33
Ahmed Khan
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Do any one knows about the thumb rules to assing the resources to a P3 programme...?

The normal activities are
Excavation
Blinding
Consolidation
Water proofing
Construction of wall ( 20M ht)
Back filling... etc....
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Replies

Tue, 2009-02-10 10:17
#1
Se de Leon
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Hi Maask,

Are you looking for rule of thumb productivity rates? If you’re looking for a standard rates then, you could check the productivity rates in PP, or you can check R.S. Means. There are more but the above are some of the references I’m using plus more importantly, based on experience rates.

Don’t rely solely on these references because these could only become a close approximation of your assigned resources depending on many factors like weather, available crew, available materials, how experienced are your crew how tight is your working area and many more. In other words, actual experience and common sense will play the bigger part.

I hope this helps.
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Tue, 2009-02-10 09:40
#2
R. Catalan
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Maask,

One is, if you assign more than one driving
resource to an activity, the longest calculated resource duration determines the activity’s remaining duration.





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Tue, 2009-02-03 03:37
#3
Mike Testro
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Hi Alex

BOQ - Cost Plan - same thing.

Best regards

Mike Testro
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Mon, 2009-02-02 23:07
#4
Alex Wong
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How about your BOQ??

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Mon, 2009-02-02 07:38
#5
Anoon Iimos
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Maask,

The basis would be:

1. Quantity of Work(s)
2. Productivity Rates
3. From the above two items, you can assign your intended units per day (or units per planning unit). For me, that is straightforward.
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Mon, 2009-02-02 03:47
#6
Mike Testro
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Hi Maask

We are getting into resource modelling now - what software are you using?

Generally the resource modelling aspect of planning software works the same.

Hours = the work to be done for each section extracted from the cost plan.
Allocation = the gang to be set on each work section.

You do not need production rates because you have bypassed that requirement.

For instance in the cost plan there is a total sum of £15,000 for brickwork - this is how I extract the hours:
Brickwork

Cost Plan £15,000.00
Profit & O/Head 10.00%
Net Value £13,636.36
Labour % 35.00%
Labour Value £4,772.73
Labour rate £18.00
Labour Hours 265.15

The hours are then distributed pro rata to where bickwork tasks are on the programme.

The gang sizes are set as appropriate.

The resource modelling is set to show "duration" based on "Hours" balanced by "Gang".

In PowerProject all this data can be copy / paste from the spreadsheet so it only amatter of minutes to set up.

In P3 you have to enter every bit by hand - maybe a day or two.

Best regards

Mike Testro
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Mon, 2009-02-02 02:50
#7
Ahmed Khan
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Dear all,

Hope U all understands my problem, Still I want to simplify, I want to assign the Budgeted Quantities for the below mentioned ( Like that) activities in HOURS.
Do we have any thumb rules..? If not can we create it..?

Can any one give me the solution of problem.

Thanks & Regards,
Maask
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Mon, 2009-02-02 02:40
#8
Ahmed Khan
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Mike Testro,

Thanks for the mail,

The same thing I am also considering the resource called “Hours”
But to assign them to the activities which I mentioned below, Is there any specific thumb rules..?

Thanks & Regards,

Maask
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Mon, 2009-02-02 02:32
#9
Ahmed Khan
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Samer,

Thanks for the mail,

The production rates is totally dependent upon our actual resources. It is not accrding to the planned.

But I want to assign the resources according to quantity calculated.


So is there any thumb rules to assign the resources…?

Thanks & Regards

Maask
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Mon, 2009-02-02 02:25
#10
Ahmed Khan
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Arman

Thanks for the reply.

I am looking for quit same thing but still it doesn’t meets my requirements. The quantities for instance:

Excavation (120 Cu M)
Consolidation (30 Cu M)
Concreting (250 CuM)
Shuttering (1000 Sq M)
Scaffolding (500 Sq M)
Back filling (400 Cu M)… etc… are the quantities which I’ve calculated, and according to the quantities I want to assign the resources.
Instance, For excavation I need the Labour General, Labour Operatives etc… So how do I assign these resources to the activity.
So my final question is “ Is there any thumb rules to assign the resources to such an activity..?

Thanks & Regards
Maask
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Sat, 2009-01-31 22:16
#11
armando moriles
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Maask,

I forgot the proposed resource crewing system...

4man scaffolding team
8man forms team
10man rebar fixing team (excluding cut and bend team)
8man concrete pouring team (if pouring extends more than 8 hours, forms and rebar team may assist)
1 rigging team
1 survey team (part time0
1 welder (if required)


regards,
Arman
Arman
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Sat, 2009-01-31 20:20
#12
armando moriles
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Maask,

Suggetion for your reference for the construction of your 20M high wall:

@ 3M lift, you have 7 lifts total;
@ 3 uses refurbishment cycle for 3/4" thick ordinay plywood;

reference 120m2 forms concrete contact area/lift
total forms concrete contact area = 120m2 x 7 = 840 m2
Using 3/4" ordinay plywood as forms @ 3 Plywoods/set
no. of sets = 14 (7 each face)

scaffolding 1 day
Fix rebar 4 days (highly variable depending upon no. of resources)
Fix forms 1 day plus 1 day if there are cast-in plates
QA & survey check, final adjustments, sign off for pouring 1 day
Pouring 1 day
Strip/clean Form 1 day
cycle total 9 days/lift + 1 day for CIP(if any)

total duration = 9 days/lift x 7 lifts = 63 days
plus:
10 days allowances for forms refurbishments and other delay allowances = 73 days

equipment : 1 mobile crane
rebars : within 5-10m from structure

Backfilling works after structure is completed, cured and vibration secured.

If you intend to backfill after each lift to get rid of high scaffolding system, the cycle time is different and long.


Regards and hope it helps...

Arman








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Fri, 2009-01-30 09:51
#13
Samer Zawaydeh
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Dear friend,

The production rates for the following activities depends on the number of machines and manpower you have on site to complete the job. For a small/medium size job, you can consider the following production rates

Excavation: 1000m3/ days for soil strength around 2
Blinding: 1000m2/ day depending on the number of pumps.
Consolidation: If you mean Fill, you can go up to 1500m2/day per 20cm layer
Water proofing: 100m2/day / 2 manpower (vertical walls)
Construction of wall ( 20M ht): too general.
Back filling... etc....: depends on location, between footings or open areas (100-500m2) compacted with testing.

The above figures are too general. The best source for information would be your site engineers and supervisors doing the job.

Best,

Samer
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Fri, 2009-01-30 05:06
#14
Mike Testro
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Hi Maask

There are three factors to take into account.

1. Volume of work
2. Appropriate production rate
3. Gang size

The work volume is taken from the cost plan.

An experience planner will have access to a number of production rates - the skill is in determining which one is appropriate ie hand fixed rebar or prefabbed rebar.

The gang size relates to how many people are available plus how many can be put in one location.

For simplicity I only use one resource called "hours".

The resource hours can be extracted from the cost plan by use of labour content % / local labour rate.

The resource hours are then allocated to the relevant activities and a suitable gang size selected.

The durations are then modelled by the software.

Best regards

Mike Testro
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Thu, 2009-01-29 05:10
#15
Ahmed Khan
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Arlene Cananan,
I dont get it. Could U plz give me the classifications where exaclty it is,,?
Thanks & Regards
Azeem
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Thu, 2009-01-29 04:22
#16
Rlin C.
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Dear Maask,

If you meant computation of manpower resource, refer to Prod-Rates in this website. There are rule of thumb rates listing.

Regards,
Arlene
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Thu, 2009-01-29 01:25
#17
Ahmed Khan
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Dear Samer,
Thanks
But i want to know the thumb rules. I meant the distribution of labour resources to the below mentioned activities.

Regards
Azeem
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Wed, 2009-01-28 15:09
#18
Samer Zawaydeh
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Dear Maask,

To assign the resources in P3 you will need to go to the Resource Dictionary.

Press "Data" then "Resouces", then you will get the "Resource Dictionary". You can add the manpower, machines as you like.

Best Regards,

Samer
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