Mohammed Hamed Ahmed Soliman 
Toyota Production System Concepts [EPUB ebook] 
Standardized Work is a Goal — Not Just a Tool in Lean Practices

The most important thing in standardized work is finding a balance between giving employees strict rules to follow and allowing them to be creative and come up with new ideas to consistently meet difficult goals like cost, quality, and delivery. The secret to finding the right balance depends on how standards are written and who helps create them.