The main use of lean methodology is in the manufacturing sector of business for which it was created for. This was due to the shortages of material and manpower at the end of 1945.
The main objective of the lean methodology is to create a quality product with the least amount of manpower and material. By doing this in every aspect of the project, the waste can be reduced or eliminated and the maximum effect from the employees work can be realized. Eventually it was found out that this process also maximized the profit potential of the projects where it was deployed.
Today the lean methodology is a constantly evolving methodology where it is deployed. Waste and inefficiency is a constantly changing atmosphere in the work place. Not only do the project manages see where waste is being created and can be eliminated, but so do the employees and team member so of the project.
Because the work place is constantly changing; the lean methodology allows and encourages changes to be made to the processes so improvements can be made on a constant basis. The process for these changes is part of the lean methodology itself. Without it, this methodology would not be able to help improve the project by reducing the waste and errors that are occurring during the production of the deliverables.
One of the key factors to making the lean methodology work efficiently is to only have on hand what is need in terms of raw materials. The just in time approach does have some draw backs, but the potential positive effects are greater. This way there is no added expense to store raw materials for use in the future; it is delivered directly to the floor where it will be used.
The drawback to this approach in a lean methodology is if there is a delay from your third party vendor in supplying your needs in a timely manner. This could potentially cause down time for your production lines. That is a risk many manufacture decide to take because the positive outweigh the negative in that particular scenario.