If they are too high, employees become discouraged and morale drops. This simply means that you will be expecting a lot from sales people in a realistic framework. Whether it is raw materials, parts or product inventory, it is essential that suppliers serve your business at a high level. Make it clear to those suppliers that you expect outstanding service from them. And when the level of service falters, hold the supplier accountable for correcting the problem.
Some suppliers consistently underperform.
In these cases, it might be time to look elsewhere for a supplier.