I want to ask whether there is any BPM type of wastes(i.e waiting time or overproduction) in the following process:

The technician's steps include conducting component tests (duration: 10 minutes), identifying the most likely cause of the failure (duration: 4 minutes), and repairing that component (duration: 15 minutes). Once repaired, the technician then tests the part in a test rig (duration: 10 minutes), and if it passes, places it in an "Urgent repaired" tray (duration: 30 seconds). If the part does not pass, and this happens 15% of the time, the technician will escalate to a senior technician (duration: 3 minutes), who undertakes the same repair and test steps up to twice more (40% of the time, it needs to be done twice more). If that doesn't pass the test (10% of cases), the senior technician rebuilds the entire part (duration: 1 hour), which is then tested as before, and once passed, placed into the "Urgent repaired" tray. The technicians are aware that 3pm is the cut-off for parts to be dispatched each day, so work towards completing parts of their work by then, though at any point after starting the repair and before completing it, the client might call to request further firmware upgrades, which results in the repair process needing to restart (and that happens, on average, at the 50% point of completion of their part of the process).