Construction Estimating Information: Construction Estimating Techniques

Estimating is calculating the quantities of various items to be used  and the expenses that are to be incurred in the work to be done. Estimated cost is the total probable expenses that are to be incurred in the work. It is a close approximation of the actual cost. The conformity of the estimated cost to the actual cost depends on the estimating accuracy and the correct visualization of what is to be done. Obviously, correct estimating is essential. Under-estimating can lead to customers' unpleasant shock when the work is completed and the bill is presented. On the other hand, over-estimating may cause the loss of the estimator's client. Estimating is the most significant among the practical aspects of construction management. One aspiring to a career in the profession must pay close attention to learning the estimating process. It is a relatively simple subject to understand, but without close attention to its application, one is unable to effectively use the technique for practical work procedures and methods.

PURPOSE OF ESTIMATING
To provide a realistically accurate idea of the cost.

Necessary estimation gives the owner an accurate idea of the cost to assist him in making a decision as tp whether the work can be carried out as proposed or needs to abandoned or curtailed, depending on the funds available and direct and indirect prospective benefits. Proper sanction for allocating the required amount has to be obtained for government works. In case works are let out on a lump sum basis, the estimator must be in a position to know the exact expenditure amount he is going to charge them.

1. Estimating Materials
From the work estimation it is possible to determine the required materials and quantity for the work to make the arrangements to procure. Building a deck is important as a science and it is necessary for estimating the amount of material. You may not have the exact quantities needed, but at least you get close to the right quantities. It is better to first check the return policy of your supplier, so that you can surely bring back any of the unused salable items for a full refund.

2. Labor Estimating
In doing the estimate, you must know the number and different categories of what kind of workers who will have to be employed, so that the work can be completed in your specified time. In plumbing work estimation for example, the expense of the labor may be variable due to two causes. First, not all workmen are equally good in planning and designing what is needed to complete the job. On the other hand, slowest workmen’s output must not be taken as a standard. Too much labor will be allowed for if it is, and a very high bid may not secure the contract. Figure out what average output of men is and use that as a basis for calculating the labor.

3. Estimating Plan
Find out the amount and what kind of materials needed to complete the work.

4. Time Estimating
Estimate of a work and the past experience may help one to closely estimate the required length of time to complete the item of work.

Note: The importance of knowing the probable cost does not need emphasis. Estimating materials, estimating labor, estimating plan, and estimating time is effective in execution and planning of any work.

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