# TECHNICAL CALCULATION AND ESTIMATOR'S MAN-HOUR MANUAL

## by: Marko Bulic

### TECHNICAL CALCULATION MANNER OF DATA COMPILING

When the call for tender is received and the installation/erection technology selected, and when man hours for the works ar e calculated, the estimator shall also provide the data required for calculation of a manhour rate. Each item is assigned the number of hours per each unit and the total number of hours which is written in a special place in the document. He will provide written data for calculation of the manhour rate in the following way: To be written on the top: name of project, name of client, place of works, date, and other data for the project identification.

**1. QUANTITIES AND MAN HOURS REQUIRED**

The estimator will record the quantity of works mostly in kg or tons. These quantities shall be given for a group of works, type of works, buildings, kind of material, size and the like. This is not always easy to do because of insufficient data contained in the call for tenders. Anyhow, the estimator shall make some sort of estimate or exact calculation of the quantities tons, kg, etc. Each group will be entered the basic data, rates or effect, and hours required. Finally, he shall state the total weight, hours required and the effect. Similarly, each group of works shall be assigned a productivity efficiency percentage (PEP) and finally an average PEP for all the works (acc. to page11).

**2. MANPOWER**

- Works Schedule: If the time for execution of works is not stipulated in the call for tender or some other document, the estimator will estimate the time on the basis of his experience and from the tables on the page 118.