Early investments in upgrades to plants and training can pay big dividends in the following years by lowering the cost per pair. However, you must ensure that prior to investing in any upgrades that there is adequate time remaining in the simulation for ROI. "Expenditures for best practices training have four highly positive benefits in all plants: (1) helping curb reject rates associated with defective workmanship, (2) helping improve S/Q ratings for both branded and private-label footwear, (3) curtailing materials waste and potentially lowering material costs at the plant by as much as 20% annually over a period of years, and (4) increasing worker productivity up to a maximum of 2.2% annually. In Year 10, the company spent about $44 million on standard and superior materials, so making use of best practices training to achieve (over time) materials cost savings of even 5-10% annually (and maybe 15% to 20% annually over a period of years with an all-out long-term best practices training effort) is one way to achieve a sustainable cost advantage over rival companies." (Player's Guide, 2018) And as I mentioned in the article after each round of the simulation toggle between annual base pay increase, incentive compensation, best practices training, no. of models assembled. Workers' productivity is sensitive to your rivals' compensation package you will have to outdo them in this area as well to keep your people happy, your rejection rate lower and hence your cost per pair.