A little secret of successful estimates

Do not dispute the estimate for construction - a thing very seriously, and to approach its preparation need to comprehensively study the issue and clearly for themselves understood: "And that, actually, I want to see the result?".

Option degenerate, because none of us are just not able to see the whole thing.

Just because the world around us is immense and complicated, and estimates, as a special case of an attribute of such a world - not less immense and complex.

Nevertheless, there is one little secret that will bring match your budget to reality and, consequently, will bring you more satisfaction from knowing you have all competently made. Interested?

The secret to this is called a "ten percent". If more, the "ten percent for each item, plus another ten percent of all items at once." Still unclear? Do not worry, it is actually simple: when you enter in the estimate of the next item (for example, "lumber on the roof - 2 cubic meters at a price of 6,000 per cubic meter), then simply do this: instead of the correct account of this example I should read - Lumber for the roof - 2.2 cubic meter at a price of 6,600 per cubic meter. " As you can see, each item is added I have mentioned 10%. Well, when you have a complete list - do the operation desyatiprotsentovaniya to the totals of this list. The output of the result will be much more close to reality than the original estimate.

Why 10 percent? The point here is several factors. Firstly, we all tend to idealize their understanding of the depth of the issue and believe that since we are somehow just know everything and know how to count. The bottom line is different - here forgot to calculate shipping costs, it felt wrong area, etc. Here are some notorious cases and covers 10%.

The second factor is generally a ridiculously simple: often in the estimates is the so-called "perfect" material consumption (the case when all the purchased material without the rest goes to the cause). In practice this happens extremely rarely, because every piece of material is endowed with such an integral part of as waste. These wastes constitute about 10%.

You can say that much controversial, that not all waste materials as much 10%, etc. To this I will object as follows: yes, not all waste materials 10% - there are more, sometimes without any waste. But then, estimates have not consist of one paragraph, so in the end everything is aligned so that the ten percent rule starts to work.

In conclusion, I want to stipulate that this rule does not apply to any term of execution of works, nor to the cost. Rule of ten percent should be applied only to the estimates for materials, because other calculations are quite different rules. For example, the performance time is approximately the equation - the desired run time * 2.5 + 2 months. It is largely empirical, but just shows that you will never get to meet the deadline. So keep it to yourself in the mind and a more philosophical attitude to the various delays.

Good luck on the construction site!