Question 6

For a 2–hour period each day, a worker picks up blocks weighing 12.5kg from an incoming conveyor belt, then turns towards the right and drops them into a box as shown in Figure Q6. Four blocks are loaded into the box every minute. The blocks are generally held close to the worker’s body throughout the process. Using Table Q6 and the NIOSH lifting equation, illustrate if this is a cause for concern. Recommend, with reasons, any changes to the height of the conveyor belt to allow the worker to load the rolls effectively during the same period without any concern.

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SST102: Human Factors and Systems Design

Question 7

For webpage and apps design, guidelines such as Nielson’s heuristics can be applied to enhance the usability. Discuss briefly the following THREE (3) Nielson’s heuristics. For EACH heuristic, illustrate with a screen–capture of a DIFFERENT webpage or app screen, explaining how each heuristic is applied in the webpage or app screen.
i. Visibility of system status
ii. User control and freedom
iii. Error prevention

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University	Singapore University of Social Science (SUSS)
Subject	SST102: Human Factors and Systems Design

SST102: For a 2-hour period each day, a worker picks up blocks weighing 12.5kg from an incoming conveyor belt: Human Factors and Systems Design, SUSS, Singapore

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