Yes i agree with the priority of targates given by TPS expert Shigeo Shingo.
1. “Easier” is an improvement from the point of the operator. This should also mean that it’s safer for the operator to do; any improvement activity should first be focused on safety.
2. “Better” is an improvement activity that improves the quality of the operation and/or product.
3. “Faster” is an improvement activity that increases efficiency.
4. “cheaper,” should be the least critical of the improvement activities.