I’ve experienced a similar set of circumstances in my work experience. I work in the production/manufacturing department. While quality and production are within the same physical environment, their work appears very separate. Even when working on related projects, one department might be operating at a different speed than the other, with one lagging behind in terms of phases. For example, with trying to change an operation in the manufacturing side of the product, quality still needs to approve the calibration of a machine. With this lag, the manufacturing cannot progress to the next phase of the project. In order to bridge this gap, both departments should have frequent meetings to follow up when there is a common project shared between the two. Both sides should freely voice their concerns when it comes to the rate of progress, with the quality department explaining why one phase must take longer in order to be as thorough as necessary, and the manufacturing side explaining the urgency of the overall project.