In their iconic book “Lean Thinking” Womack & Jones identified 5 Lean principles of fundamental importance.
1) Specify Value from the End Customers perspective. What does the End Customer actually want from the product or service. The only way to ascertain this is through the Voice Of Customer. We will expand on this in later posts.
2) Identify the Value Stream. This is the sequence of processes from raw material to the end customer which comprises Value Adding and Non Value Adding steps.
3) Make value Flow. The process should be continuous, avoiding batch production and queues, or at least minimizing them. Aim never to delay a value adding step with a non value adding step. If NVA steps are unavoidable they should be done in parallel with VA steps.
4) Operate via Pull not Push. The system should be driven by the customers demand avoiding unnecessary over production.
5) Strive for Perfection. Minimize defects and aim for Total Customer Satisfaction.
Adopting these 5 Lean principles leads to a Kaizen journey of Continuous Improvement.