Q.A worker is given a Time Allowed of 12 hours to complete a job, at a Time Rate of ₹15 per hour. The worker actually completes the job in 10 hours. Calculate the Bonus and Total Earnings of the worker under the Halsey Premium Bonus Scheme (bonus share 50%).

The worker finishes 2 hours early, so under Halsey the bonus is exactly half the money value of those 2 saved hours, added on top of the wage for the 10 hours actually worked.

Time Saved = 12 − 10 = 2 hours. Bonus = 50% × 2 × 15 = ₹15. Basic Wages = 10 × 15 = ₹150. Total Earnings = 150 + 15 = ₹165.

Step 1 — Time Saved: Time Allowed − Time Taken = 12 − 10 = 2 hours.

Step 2 — Bonus: 50% × Time Saved × Time Rate = 50% × 2 × ₹15 = ₹15.

Step 3 — Basic Wages: Time Taken × Time Rate = 10 × ₹15 = ₹150.

Step 4 — Total Earnings: Basic Wages + Bonus = ₹150 + ₹15 = ₹165.

Verification: the worker's earnings per hour actually worked = ₹165 ÷ 10 = ₹16.50, which is more than the plain Time Rate of ₹15 — confirming the bonus genuinely raised the worker's effective hourly earnings, exactly as a Premium Bonus Scheme is designed to do.

A common error is stopping at the Bonus figure and forgetting to add the Basic Wages (Time Taken × Time Rate) to get Total Earnings, or mistakenly computing Basic Wages on the Time Allowed (12 hours) instead of the Time actually Taken (10 hours) — Basic Wages are always based on hours actually worked, never the standard time.