„5 Whys?” – case study within mining industry.
The plant processing aggregates sought opportunities to reduce manufacturing costs. This was carried out for the following analysis. Stage 1 After analysis (P&L analysis, value stream map, process map, Pareto principle), the areas with the largest shares in the operating costs were identified: Stage 2 The first area that was subjected to observation was energy costs, identified in Stage 1 as the highest costs to the plant. The following chart presents the distribution of energy costs: Stage 3 In the subsequent stage, current levels of [...]