Use the Liberty Mutual (Snook and Ciriello Tables) to complete this homework.
1) You need to evaluate a job where workers select items unload a shipping box and place items on shelves in a warehouse. The job requires workers to reach about mid-body height (45 inches from the ground), select an item weighing 38 pounds, and lift it to the shelf located approximately 65 inches from the ground. They do this once every minute and can hold the item close to the body.
a. What percentage of men can be expected to perform this job without harm?
b. What percentage of women can be expected to perform this job?
2) Using the same job parameters from above, assume you can change the weight of the item lifted. What weight would be considered appropriate for men and women?
3) You will now use the pushing tables from the same Liberty Mutual Guidelines. There are tables for both the initial force and for the sustained force. You are reviewing a job where the worker pushes a handcart for 25 feet. The initial force is 64 pounds to start the handcart rolling. Once it is rolling is takes about 40 pounds of sustained force. They do this task once every 5 minutes throughout the day. The cart has a handle height of about 3 feet.
a. What percentage of men can be expected to handle the initial force?
b. What percentage of women can be expected to handle the initial force?
c. What percentage of men will be able to handle the sustained force?
d. What percentage of women will be able to handle the sustained force?
e. Overall, what percentage can be expected to complete this task?
4) Someone at the company gets the bright idea that it would be better to pull the handcarts from question 3. Keep the information the same, but lookup the percentiles for pulling.
a. What percentage of men can be expected to handle the initial force?
b. What percentage of women can be expected to handle the initial force?
c. What percentage of men will be able to handle the sustained force?
d. What percentage of women will be able to handle the sustained force?
e. Overall, what percentage can be expected to complete this task?
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