To gain the trust and mutually beneficial cooperation between manufacturer and customer. As the provider of products and production of our implementers should be able to deliver the best products and service to customers. Similarly, the production process, in addition to design and customer demand, we should also actively inquire about the smoothness of the best suppliers of how the process should be done, how a production is going well. In short the customer invited to get involved in the production even though it only asked his advice. And thus the customer feel rewarded and get involved in the production process.

Ask for advice customers is of utmost importance to establish cooperation and reduce errors. Lean supply chain is created and focused on the customer, so that the needs and demands of customers should be paramount. Communication between the customer continues in the goal is always to ask and involve the production process to avoid errors caused by miscommunications, between producers and customers.