Key Performance Indicators (KPIs) help measure objectives critical to business sustainability. This research takes place in a toy factory’s injection moulding department that has yet develop indicators for subcontractor performance. Poor performance significantly impacts the production. In last three months, delivered quantity exceeded target by 27%, delivery time consistency is only 78%, there...

The concept of subdirect sum matrices (a type with overlapping blocks) was introduced in 1999 and has been broadly studied. In this paper we extend by introducing the weighted sum: a blocks allowing to give different weight overlapped blocks. This naturally arises applications regions such as graphs multilayer networks or iterative methods solve linear systems equations based on We analyze same...