Active Period Bottleneck Detection – Solution. The graph shows the active periods (the black lines), interrupted by waiting times. The longest active period is the bottleneck (red). During the overlap the bottleneck shifts from one process to the next process. This image by me is licensed under the Creative Commons Attribution-Share Alike 4.0 International license. Please credit the image as shown below. For digital documents and web pages please do include the links as shown below. Thank you.