Task 6: Latent and active failures (Swiss cheese model) 6 (b) Figure 1 (below) is a Swiss Cheese model showing the main causes of the accident. Label the different parts of the diagram, giving an explanation of the label, including an example from the scenario where required. (22) Note: You must use Table 1 in the answer template to structure your answers. The number of examples required are indicated by the instructions included in the table column Relevant example(s) from scenario.

scenario below

The site manager did not know what to do in the banksmans absence so they persuaded a young apprentice warehouse worker to cover for the absent worker. The apprentice agreed, as they wanted to fit in and make friends. A banksman, who covers bays 11 20, said they would show the worker what to do and supervise them until the apprentice felt confident to do the job by themselves. The banksman viewed a digital version of the procedure document on their electronic tablet computer and talked the apprentice through each stage of the job. The apprentice found it quite difficult to read what was on the tablet; reading was not their strong point and they much preferred learning by doing the job. However, before the apprentice could put the procedure into practice, the banksman was called away to an incident on bay 16 that needed their attention. The banksman told the apprentice that a truck was not expected for another 20 minutes. If one did arrive early the apprentice should tell the driver to park in the waiting bay at the front of site. The banksman would then come back to help the apprentice with the first reversing procedure. The banksman then left, taking the electronic tablet computer with them. A truck arrived earlier than anticipated. The apprentice explained the situation and asked the driver to park for a few moments. The driver was annoyed by this and said that they were on a very tight schedule to meet targets for the day, so really needed to unload the trailer immediately. They also said that if they were late for any of their deliveries they would lose their bonus. The apprentice, not wanting to upset anybody, and trying to be helpful, thought about if for a moment and decided that the job could not be that difficult. They decided to direct the driver towards the bay. While the truck was reversing, the apprentice received and viewed several picture messages on their mobile phone. They knew from their induction training that this is prohibited during working hours. They were distracted while viewing the picture messages and had forgotten about the truck. The truck subsequently reversed into the bay wall, much of which was demolished. At the same time, an experienced warehouse worker (they had been employed for five years by the online retailer) decided to take a shortcut to get to the dispatch area to resolve an urgent issue. The shortcut would take them past the loading bays instead of around the separate pedestrian walkway. This would save them valuable time as they were near the end of their shift. They knew that this was against the rules as this was always emphasised in the annual site health and safety training. The walkway is clearly marked out and there are signs located at various points around the site telling workers they must use the walkway. Before the accident, the warehouse worker was listening to their favourite song through their headphones while walking. The organisation prohibits the wearing of headphones on site, but the worker thought they could get away with it as there were not many people around; if they were seen it was unlikely that other workers would say anything. The worker closed their eyes for a few seconds to appreciate the song while they were walking between bays 6 and 7; they did not see or hear the reversing truck until it was too late. The driver did not see the worker in their mirrors as the worker was in the drivers blind-spot by this time. The worker was hit by the truck and sustained serious injuries. An ambulance was immediately called and first aid was given until the ambulance arrived. The injured worker has been taken to hospital but the extent of their injuries is unknown. The driver was uninjured, however they were extremely traumatised and therefore sent to hospital as a precaution. The young apprentice is also traumatised and seems to be in shock. The apprentice has been sent home and HR will contact them to discuss support for their return to work. You tell the team to start an investigation and that you will drive over to Site B shortly to assist.