250,000 units/yc Customer Demand Typical Production 3. 20 days/month 1 shift 8 b

Question

250,000 units/yc Customer Demand Typical Production 3. 20 days/month 1 shift 8 brs/day 480 min/shift Determine a Daily Demand b Hourly Demand C TAKT time (sec/unit) sec/unit Determine TAKT for each letter using only designated constraints as inputs d Breaks e Breaks f Scrap rate @ g Scrap rate @ h Rework @ i Equipment Uptime j Daily Meetings k Breaks 30 min/shift 20 min/shift 100 pcs/day 10% 5% 90% 5 min/shift 30 min/shift 5 min/shift 50 pcs/day 20 min/shift 10% 95 % Daily Meeting Scrap l Breaks Rework Uptime

Explanation / Answer

According to given conditions, every month has 20 working days. So, 12×20 days = 240 working days.

Answer a:

250000 units / 240 days = 1041.67 units per day

Answer b:

Hourly demand = 1041.67/8 hrs = 130.21 units per hour

Answer c: Total working time in seconds = 240 × 8 × 3600

= 6912000 secs

Total demand = 250000 units

So, takt time = 6912000/250000 = 27.648 sec/unit

Answer d:

30 min break per shift = 30×60 = 1800 seconds per shift

So, total break across 240 shifts = 240 × 1800 = 432000

Total production time = 6912000 - 432000 = 6480000 seconds

So, takt time = 6480000/250000 = 25.92 seconds per unit

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