Method, system and computer program for assisting decision making in choosing parts for assembly

A system for assembling parts chosen from a plurality of first parts and a plurality of second parts, comprising:

• a calculation unit, configured:
• to estimate, for each first part and each second part in the plurality of first parts and the plurality of second parts, a quantity of material to be grinded so that the first part and the second part can be assembled, and a discrepancy between a relative position of the assembled first and second parts and a nominal relative position, wherein a sum of the estimated quantity and of the estimated discrepancy is a defectiveness indicator for an assembly of the first part with the second part;
• to reduce said defectiveness indicator when the first part has been available for assembly for a period which is greater than a first threshold or when the second part has been available for assembly for a period which is greater than a second threshold;
• and
• to assign, when a batch of N assemblies is to be made, N first parts from the plurality of first parts to N second parts from the plurality of second parts thereby forming N pairs of a first part and of a second part, wherein said N pairs minimise a total defectiveness, the total defectiveness being the sum of the defectiveness indicators for the assembly of the first part with the second part for each of the N pairs;
• and
• an assembly station used for making the batch of N assemblies by assembling the N pairs of a first part and of a second part.