1. The readings in the table below were taken by the snapback timing method of direct time study to produce a certain subassembly. The task was performance rated at 85%. In addition to the above regular elements, an irregular element must be included in the standard: each rack holds 20 mechanism plates and has universal wheels for easy movement. After completing 20 subassemblies, the operator must move the rack (which now holds the subassemblies) to the aisle and then move a new empty rack into position at the workstation. This irregular element was timed at 2.90 min and the operator was performance rated at 80%. The PFD allowance is 15%. Determine (a) the normalized time for the cycle, (b) the standard time, and (c) the number of parts produced by the operator, if he/she works at standard performance for a total of 6 hours and 57 min during the shift. Element and description 1. Pick up mechanism plate from rack and place in fixture. 2. Assemble motor and fasteners to front side of plate. 3. Move to other side of plate. 4. Assemble two brackets to plate. 5. Assemble hub mechanism to brackets. 6. Remove plate from fixture and place in rack. Observed time (min) 0.42 0.28 0.11 0.56 0.33 0.40