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Answer (A) is correct . Learning curves reflect the increased rate at which people perform tasks as they gain experience. The time required to perform a given task becomes progressively shorter. This technique is applicable only to the early stages of production or to any new task. One common assumption is that the cumulative average time per unit is reduced by a fixed percentage each time cumulative production is doubled. Based on the given data, this company has a 90% learning curve (90% ¡Á 10 minutes = 9 minutes, and 90% ¡Á 9 minutes = 8.1 minutes). Accordingly, the cumulative average time to perform eight tasks is 7.29 minutes (90% ¡Á 8.1 minutes).<
Answer (B) is incorrect because The cumulative average time for four tasks is 8.1 minutes.
Answer (C) is incorrect because The cumulative average time for 16 tasks is 6.56 minutes.
Answer (D) is incorrect because The cumulative average time for 32 tasks is 5.90 minutes.