1. After some investigation together with the designer in the laboratory, you find out that there are various types of possible nonconformities that cause the product fail to function as expected. They are: I. Bad connection of battery (3 cases) II. Bad connection of wireless signal (4 cases) III. In consistent spinning speed of the blade during flying process (3 cases) IV. In consistent blade wings per product unit (39 cases).

2. You are also required to calculate the type 1 error as the Samples’ (subgroups) size = 5, Process mean = 1.2 g, Process S.D. = 0.08 g, Control limits = mean +/- 3 S.D. as the weight of the product is considered to be one of the key quality problem by a director, Harry. Do you agree with him, and why?