Vrex Explorer uses "The methodology of the 7 mudas" to calculate assembly times for new products to manufacture frequently called the Raw process Time "RPT".

Execution times of new products are in direct relation with the number of parts to mount and their specific difficulties to overcome. The user can define the product structure by specifying the count of basic- and fixation parts and identifying or qualifying the muda's or extra manipulations to overcome which are inherent to mount and improve the parts. 

The graph on the left is a visualisation of the number of parts in a product categorised by their labour execution time.  Labour times are typically organised in a Poisson-curve.   Layout Time or workplace organisation is not included in the graph and calculation. It is afterwards added to the labour time "Design Time" as a fixed percentage or based on a layout plan.  Layout is company and situation depending and is not related to the product structure or the parts to mount.

This method is specially ment for companies who frequently assemble products for different customers and who must provide their customers with a cost calculation before they obtain the order to start assembling.

A raw process time calculation is done by specifying the amount of Added value which is a given value or the number of parts to mount and quantifying the muda's with time study or with a qualifying methode.  Qualifying allows you to speed up precalculations and it is feasible with an acceptable accuracy of less than 10%.  You can specify the loss or mudas in 3 different ways. 

1. Exact time by use of time study in a pilot fase. 
2. Statistical values based on object times.
   Vrex Explorer has a database of frequent used parts like bolts and nuts. The user can select preanalysed  parts to define his product structure.
3. Statistical values based on a collection of know problems with predefined times.  For example, 1 time extra positioning, opening or pressing-in equals a fixed know labour time.  All extra manipulations which are inherent to your business are definable in the DFA and DFM database.