Thumb rules to assing the resources

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.

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.

Hi Alex



BOQ - Cost Plan - same thing.



Best regards



Mike Testro

How about your BOQ??

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.

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

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

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

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

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

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

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