A bottleneck analysis is a process understanding where issues occure in the flow of products or process especially where the work takes longer to complete.
Process bottlenecks are among the reasons why processes slow down, projects get delayed, cost overruns occur, and the whole process becomes unpredictable. Instead of fighting the symptoms, try to understand where the bottleneck occurs by creating a simple bottleneck analysis and then trying to solve for the issues that cause the bottleneck in the first place.