scenario 03 scenario 04 Participants: Participants: • • • • • • • Turnstile worker Policeman (If a policeman can be involved into frame operation). Vitalya Turnstile worker Policeman Vitalya 1 Vitalya 1 Time: Time: Turnstile operator is at the post. Not during the rush hour Not during the rush hour Turnstile worker is at the post, Vitalya 1 and Vitalya 2 operate the frames. Vitalya is at the frames. Vitalya 1 takes Unit 1 to the X-Ray. Vitalya 2 operates the frame while Vitalya 1 inspects Unit 1. Policeman operates X- ray. Vitalya takes Unit 1 to the Policeman so he inspects Unit 1. Conclusion Conclusion Frames are left unattended for a short period of time. If a policeman is involved, Vitalya can do his job alone not during the rush hour. Turnstile operator has to do her job and stay at the turnstile post, Vitalya needs a co-worker. If Vitalya 1 and Vitalya 2 operate the frame, then they do their task effectively.