Analytical Estimating

This technique  of work measurement  is used  to determine the  time  values for jobs  having  long and  non repetitive  operations. The time  values  are determine  by using  synthetic  data  or on the basis of  the past experience of the work study  engineer  when no synthetic  or standard data  is available. It is  essential that the estimator  must have  adequate experiences of estimating motion  study time study and the use of standard data  ( or  synthesizes time  standards.)

Procedure or Analytical Estimating

The various steps involves are:

1. Find out  the job details  such as job  dimension standard procedure  to do  the job  and the  job  conditions  such as poor illumination high  temperature, hazardous environments  available  of  jigs  fixture  or tools  etc,

2. Break the job  in to its elements,

3. Select  time   values  from the standard  data catalogue for as many  elements  as possible ( i ,e, use   synthetic  data  wherever available)

4. Estimate  the time  values  for the remaining  elements ( for which synthetic data is not available )from  past  knowledge and experience,

5.  Add the time  values obtained by steps ( 3)and (4)  to get the total  basic or normal time for  100%  rating.)

6. Add the  appropriate  blanket relaxation allowance ( say  10% to 20 %  of total normal  or basic time) note that  in analytical estimating, the  relaxation allowance  is not added to time  values  of individual elements. The  blanket relaxation allowance depends on the type of the  job  and the job conditions .

7. Add any  other allowance  if applicable to arrive  at the  standard time  for the given job.

Advantages of  Analytical  Estimating Technique

a. Offers  the same  advantages enjoyed b  synthesis  method,

b. Helps  in planning  and scheduling the  production,

c. Provides  a basis  for  fixing the  labor rate for  non  repetitive jobs.

d. Steps  to improve labor  control.