Develop high quality, continously improved and well-understood processes.
This might consist of roles and responsibilities involved, skillsets and skills required, checklists to complete a step, surveys and healthchecks to collect and evaluate data, risks to avoid, etc.
Ensure that people expected to contribute to or who have a key stake in the outcome of the process are sufficiently familiar with it.
Check out the process health check for relevant perspectives to consider when evaluating a process.
Use the learning collected from the evaluation to improve the process before executing it the next time around.