From the report
The slides were deployed in the sequence R1, 2, 3 and 4, with 41 seconds elapsed time from the first signs of slide R1 being deployed to slide R4 being fully deployed.
The slides took between six and eight seconds from first signs of deployment to being fully deployed. All of the slides operated by the cabin crew were effectively deployed and used.
It took four minutes and ten seconds from the first signs of slide R1 being deployed to when all of the 332 passengers had been evacuated.
It took three minutes and twenty seconds for the evacuation of passengers down slides R3 and R4. A further two minutes thirty seconds after the last passenger evacuated, a crew member evacuated down slide R3.
A light wind caused the slides to move slightly whilst they were in the process of deployment, but the slides were stable and stationary once in use and passengers were evacuating form the aircraft.
The slides from the Boeing 777 are designed for dual lane use. Continuous dual lane use was not achieved, and passengers tended to come down one after another. This, together with the apparent lack of a sense of urgency and the fact that some bags were thrown down the slides ahead of passengers, contributed to the long evacuation time of over four minutes. A rate of one passenger every two seconds appeared to be the best that was achieved.
The average rate down each of the slides was one passenger every two to three seconds. For certification, an evacuation rate of approximately one passenger per second is required to be demonstrated.
So were the crew sloppy or is this a realistic evacuation time when you don’t use Boeing employees?