The estimation of work is used in the process of estimation and for a job in a bid. This process of estimation includes the submission of a bid proposal in a specific job and as well as costs. The created form of estimation is said to be as a master estimate, **devis travaux ** is a process to find an estimate or it is said to be an approximation, in which the value is used for some other purposes even when the incomplete input data has occurred that may be unstable or uncertain. It is derived in the form of available information which is said to be in the best form. Sometimes the estimation will be incorrect when it is estimated overly. The process of underestimating the process will be short in these actual results.

**Estimation is done by**

The estimation will always be done in another process of sampling. Sampling is a process in which the subset selection in an individual manner in a population of statistical way. There are two most advantages in the process of sampling is data faster in the collection of the population in the entire format and as well as cost in a lower formation. There are survey sampling and as well as acceptance sampling

**Survey sampling**

In the case of survey sampling, the weights can be applied in the data form, in the case of design in a sampling manner in a particular form of sampling method which is stratified.

**Acceptance sampling**

In the case of acceptance sampling, which is used to determine the way of production with a lot of meets in material with the specification in the governing.

**There are almost eight types of cost estimation :**

Cube rate estimation of costs

Preliminary estimation of cost

Approximate quantity estimation of costs

Plinth area estimation of cost

Supplementary cost estimation of costs

Annual repair estimation of costs

Revised cost estimation of costs

Detailed cost estimation of costs. These are the cost estimation types beds on the process of the construction process.

**There are near to two types of estimation **

Interval

Point

The first type to be explained is Point estimation, this is a type of estimation in which the single value, the statistic in a sampling manner, the information which infers the population is used.

**Uses**

In the case of estimation, the approximation describes in finding the process in the lower bounds or the upper case bounds form in the quantity which can be precisely evaluated.

The observed quantity, there is two quantity for the process of estimation, they are prediction and as well as forecasting is applied. The theory of estimation deals with the proper findable estimation of properties with a good source. This type of estimation process used in the property of signal processing, to get an approximation process of a signal which is unobserved in the basic signal which contains noise.

For example, in the estimation process, the quantity which is said to observed prediction and as well as forecasting is used.

Estimation is the process that is important in economics and a well as in business, as many figures or variables that exist in a large scale development of activities. The estimation which is said to be informal, available of little information is said to be a guesstimate.