Explain in your own words how the load test (performance test) is applied to the patient turning apparatus shown in the figure, and guess how the expected result will be. The main part of the product...

Explain in your own words how the load test (performance test) is applied to the patient turning apparatus shown in the figure, and guess how the expected result will be.

The main part of the product consists of a polyurethane sponge. Stain-proof upholstery fabric will be used as the outer surface material. In addition, there are heating pads working with the logic of electric blankets in this apparatus, please answer by taking these into account when answering.