It Is Common To Use Mock-ups, Prototypes And Other Representations To Explore

It is common to use mock-ups, prototypes and other representations to explore an interactive system before it is actually built. (Holmquist, L. (2005)) He explained further: This approach has been particularly fruitfuil in participatory design, where users are brought in very early in the design phase.
Scenario
Consider the following scenario for the derivation of effective authentication techniques:
It was another day at Loughborough wastewater plant and the workers were going about their daily business. John, the manager had sent Billy, the newcomer out to the pump station at the University to go and attend to the alarm (AK501) situation which recently came on the newly installed digital dashboard in his office, from where he is able to monitor in real time activities at far away pump stations.
Billy had no difficulty locating the said pump station because he had his Flashback visor equipped with navigation facilities, which makes navigating easy via GPS system. He got to the pump station and the door, which is secured with digital locks to prevent unauthorized access by in intruders, opened the lock for him automatically because his visor had communicated wirelessly through Bluetooth technology with the lock. Billy's arrival at the site of the assignment was registered (in real time) at the headquarters on the managers dashboard, which flashed Billy's identity code. Billy resumed the repair work by locating the faulty equipment which was an advanced control panel for control of the valves at that particular pump station. The situation is crucial and urgent repair is required to prevent an undesirable situation in which there will be back flow of sewage back into houses, so Billy had to act fast. Unfortunately, he is not quite competent to handle the situation so he turned the visor to revision mode, since he already got all the history of the faulty panel displayed in form of hologram in his view by his Virtual Reality visor.He requested for a playback of similar repair work by on of the experienced workers (who drives by car to any special case location carrying extra tools), so that he could learn from these video footages. At the same time he continues to hold dialogues with the manager and the experts on two separate, but parallel phone lines, from where he is instructed on the next line of action, before the arrival of the experts driving up to the pump station, also equipped with a laptop computer which receives video relay of the task he is working on, which was sent through secured WLAN network to their laptops and the database at the headquarters. The experts soon arrived at the scene and there presence was registered at the headquarters and when the repairs was completed, the repaired panel registered a log of the repair and the I.D.