When you ask people to stick to a process, you have to sell them. They have to be motivated to learn and embrace your process. 

Reasons to follow a process can include - 

• Regulatory - it's required/mandated  
• Efficiency - it's faster 
• Convenience - it's easier 
• Quality - it's better 
• Best practices - it's proven 
• Cost - it's cheaper 

Ex. "This is how we do it, because it's faster." 

"Because" is the key word. 

Each step of the process may have a different reason.