City Guilds Model Questions Vol1 2024 Engineering Question 35

A manufacturer must produce 10,000 units of a steel component. Two production routes are possible:\n\n**Process X (CNC milling)** - Setup time 2 h, cycle time 45 s per part, tool cost \(\$0.12\) per part, achievable dimensional tolerance \(\pm0.02\ \text{mm}\).\n\n**Process Y (investment casting)** - Setup time 5 h, casting time 30 min for each batch of 200 parts, finishing time 20 s per part, tool cost \(\$0.05\) per part, achievable tolerance \(\pm0.05\ \text{mm}\).\n\nThe design specification requires a tolerance of \(\pm0.03\ \text{mm}\). Determine which process can meet the tolerance requirement and calculate the total production time (in hours) for each feasible process. State the selected process and its total time.