You need to air grievances with your manager.

When a company embarks on a Lean journey, there is a lot of learning that goes on. This includes managers. Some may have experience at creating a continuous improvement culture, but many do not. They may make some bad decisions that affect your job. How you approach him or her to talk about the problem you are facing goes a long way into determining whether your boss is on your side in solving the problem or if he sees you as a complainer who is part of the problem.