spares in the HMC. if the inventory levels is minimum, the milkman carries an empty container (or Kanban card-depending on the part type) to the warehouse and after collecting proper parts, transports them back ti the HMC where they are refilled, them he (or she) may return to other duties. afterimplementing this solution min and max values should be revised at least once a month during the first two quarters and corrected until until their level is optimum. Proposed solution regards only one HMC, so in order to notice benefits of pull system implementation the solution needs to be spread to the other HMCs as well. In the long term this system should optimize spares management so that waste is eliminated and costs minimized. However it need to be underlined that implementing RPS rules requires a lot of effort and resources (in the initial phase) form the management team.
implementing PSR hild limit bullwhip effect which is typical when spares demand is forecasted.