A time study involving the preparation of hamburgers at Bill’s fast-food restaurant used the snap-back method to obtain the data (in minutes) shown in Table H.2. Allowances typically constitute 15 percent of normal time. The schedule calls for 300 hamburgers to be prepared during the lunch rush. If each part-time employee works 190 minutes per day, how many employees will be needed?

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TABLE H.2 TIME STUDY RESULTS OF HAMBURGER PREPARATION OBSERVATION RF Work Element 4 5 NT 1. Prepare patty 0.36 0.45 1 0.41 0.50 0.48 0.9 2. Cook first side 0.81 0.77 0.89 0.85 0.83 1.2 0.59 1 3. Flip, press, and cook other side 0.60 0.55 0.58 0.63 1.2 0.24 0.26 0.32 1 4. Assemble 0.31 0.27 1.0 Normal time per cycle (NTC) =