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Transferring Library Items to Estimates

Carried out an estimate by imputing the necessary values such as the price of the materials supplies, the discounts, the labor time, for each study in spite of automatic calculation can to be proved long and tiresome.

The solution will consist to create libraries in catalog sheets, established on identical tables of estimate.

The technique to be used will consist simply in opening the files of the library and to carry out a "Copy / Paste" by insertion on the places concerned. Calculations will establish automatically by taking again the mark-up, the labor rate pre-established on the working sheet of the estimate in progress.

Libraries (See the annotation below)

dataBase, library, cost, costing, estimate, estimates, quotation, quotations, heating, steam, ventilation, air, ductworking, piping, conditioning, plumbing, sanitary, gas, fire, protection, system, smoke, clearing

In this file of library "duck work" (above example), the duck elements are shared out on various working sheets, facilitating by consequence the retrieval of data.

Useful elements devoted to the creation of the library such as tariff date, the brand and the type of products and various other types of information are placed on the columns reserved for spent study.

The creation of estimate by this method proves to be very effective, sometimes it is simply enough to insert a module of study of price carried out on another operation and to withdraw the elements which are not necessary on this one and to add the missing elements.

These databases can be used for any cost estimate. If these margin percentage change, cost estimates can be rapidly re-computed after the databases are updated.

Labor

The labor cost for each item is expressed by an average time rate for a given team. These time rates integrate the payroll charges. They also take into account the paid-leaves, premiums and allowances day laborers of meal and transport, unproductive times and the effect of possible overtime. You will have to personalize your average time rate according to your principal activity, of your area, the size of the company, and the real wages of the workmen and the composition of the teams.

The evaluation of times of labour includes all the work with the installation of described materials. These evaluations are established under standard conditions: experienced workmen working in new building. The evaluations of labor also suppose that the materials are of standard category, that the use of the suitable tools is completely mastered, that the provision of the installation is not very complicated.

All the evaluations of time of labor include tasks like:

  • The unloading and the storage of building materials and the tools on the site.
  • The carrying out of the work at most on two levels above or below ground level.
  • Normal wastes of time because of the work breaks.
  • The displacement of the tools and the equipment of storage area or truck to 60 meters at most of the working area.
  • Returns of the tools and the equipment towards the storage area or of the truck at the end of the day.
  • The planning of work to be carried out.
  • The regular cleaning of the remains of construction.
  • The possible repairs because of a defective installation.

Labor Adjustment

If the work you're estimating won't be done under these conditions, you need to apply a correction factor to adjust the man-hour estimates in this book to fit your job.

Employ one or more factors of correction recommended in "below table" to adjust itself in the specific conditions of work. To make the adjustment, multiply the evaluation of the time of labor by the suitable factor of conversion. On certain work, several factors of correction can be necessary. A factor less than 1.00 of correction means that the favourable working conditions will reduce times of labor required.

Conditions

Factor correction

Work in large zone opened, without partitions

.85

Prefabrication

.90

Large quantities of repetitive work

.90

Work to more than 90 m of the deposit zone

1.03

Work to more than 120 m of the deposit zone

1.05

Work to more than 150 m of the deposit zone

1.07

Work between 3rd and the 5th floor

1.05

Work between 6th and the 9th floor

1.10

Work between 10th and the 13th floor

1.15

Work between 14th and the 17th floor

1.20

Work between 18th and the 20th floor

1.25

Work above of 21floors

1.35

Work in commercial kitchens

1.10

Work above a tilted floor

1.25

Work in attic space

1.50

Work in crawl space (crawl space)

1.20

Work in an encumbered room

1.20

Work at + of 4.50m of the ground level

1.10

Work at + of 6.00m of the ground level

1.20

Work at + of 7.50m of the ground level

1.30

Work at + of 9.00m of the ground level

1.40

Work at 10.50m to 12.00m of the ground level

1.50

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