People can't hit a target they can't see clearly.
Do employees know the standard to meet?
You can't build a house using a butter knife.
Do they have the right tools and resources?
People do what gets rewarded, not what gets requested.
Are rewards and recognition tied to performance?
If 1-5 are handled and they still can't perform, it's training.
Do they have the required knowledge and skills?
If the job requires abilities they don't have, training won't fix it.
Can they physically and mentally do it?
Perfect incentives fail if people don't value them.
Are they willing to work for the available incentives?