A manufacturing change often begins when a shop floor worker, supervisor, or member of the engineering team notices a problem on the manufacturing line such as glue failure or a line backup and ends when key stakeholders agree on a solution. A good manufacturing change process feeds data back into the design process, allowing engineers to be informed about manufacturing line issues and apply that knowledge to current and future design iterations. Changes in manufacturing should be documented so that issues may be handled quickly. A manufacturing change request (MCR) or manufacturing change order (MCO) is typically used to document the change process.
*Source: The Manufacturing Change Process