We have different definitions for lean manufacturing from different people. We have discussed some of them in our past blog posts. I believe simplicity of its concepts is one of lean’s key success factors. So we should understand lean in the simplest possible way. When I answered (once again) the question of “
what is lean manufacturing?” I thought it can be simply answered as “lean is being proactive to be reactive”. Let’s discuss this answer in some detail. But before we go into details do not forget to leave your ideas as a comment to this post. You can do this by clicking on the comments link at the bottom of this post. I really value them.
Lean is about developing a system where we can deliver what customer wants, where they want in quantities they want. In the process lean thinks how to remove any waste from this system making the product or the service higher in quality, lower in cost and higher in reliability. But if you take any business regardless of they being lean or not they want to achieve the same things. They want to satisfy their customers by satisfying their needs.
In delivering the value to their customers any business owner will tell you that they need to be proactive. These business will be proactive in purchasing raw materials, proactive in planning their capacities and proactive in scheduling their deliveries and so on. They will use advance tools like ERP and use the functionalities of MRP to plan their demands and supplies. As a result they would not run out of raw materials and they will not have any capacity issues when it comes to producing what their customer wants.
Lean is very proactive in its approach too. But they do not order raw material in advance nor are they going to block capacities for possible future orders. So how lean is proactive? Lean is proactive in developing a system which will allow them to change with the changing needs of their customers. So they would not need to order RM before they actually see a real demand from their customers for an example. For me this is being reactive to the changing situations of the markets and customer needs. Lean system is very flexible so it can run with virtually no buffers, no large chunks of stocks and can change from one product to another in a matter of minutes. So this system can produce exactly what customer wants in the way they want in the quantities they want.
Reactive approach of lean will save the manufacturer (or the service provider) a huge amount of capital since there is no requirement for them to maintain higher level of inventory. This system will not produce something the market do not need making write downs a lesser problem. Low inventory levels and coupled with other simple lean techniques will make sure on time delivery and superior quality.
At the end of the day lean manufacturer will make a better product (or a service) than its traditional competitors. All these will be achieved with lesser cost making them much more profitable.
It is very good to be proactive. But proactive for what is the question. If you try to absorb the costs of changing market demands and associated risks in the name of being proactive, you will not be successful as you can be. Worst you can fail in your business. Instead if you create a system which can quickly to adjust to the changing market conditions you will be much more successful. All the popular lean manufacturing tools like JIT, SMED, Kanban(Pull system) are aligned for this purpose.