Lean manufacturing comprises of the sole objective of creative value to the end customer. Any idea apart from this is considered wasteful and needs to be eliminated. This value is measured in terms of the amount the customer will be willing to pay for a product or service. “Lean” In a business or manufacturing environment, describes a philosophy that incorporates a collection of tools and techniques into the business processes to optimize time, human resources, assets, and productivity, while improving the quality level of products and services to customers. Becoming "Lean" is a commitment to a process and a tremendous learning experience should you attempt to implement Lean principles and practices into your organization. 
This idea of Lean has been developed over a 90-year period of time. Even though it is a simplistic approach, its principles and practices are not easily to implement, which many companies will attest too. It requires support from top level management, commitment and confidence and participation by all employees within an organization to be successful.