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Safety Stock
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This lesson throws light on safety stock.

Harshit Aggarwal
Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

U
Unacademy user
nice concept... but bro bich bich ye ye ques mt choda kro ki comments me btao... bhut sare ques chode hue h apne...
Sanjeev Mishra
a year ago
ye questions isliye dete h taki aap logo se interaction bana rhe but thanks for your gracious comments thanks for watching share and stay connected
gud going sir..I think commented ans. ko apko next video mein discuss bhi krna chahiye.so that we will get to know that our ans.is rite or nt
Sanjeev Mishra
a year ago
ok meenu #thanks_for_your_gracious_opinion
thanx for ur guidance sir
Sanjeev Mishra
a year ago
your welcome 🤗
  1. COURSE: INDUSTRIAL ENGINEERING LESSON: SAFETY STOCK


  2. ABOUT ME Graduated from NIT Nagpur in 2008 Cleared Engineering Services Examination (ESE-UPSC) Exam & Got the offer letter from most of the Maharatna and Navratna Companies * Cleared GATE Exam Rate, Review, Recommend, Share Follow me on Unacademy at: https://unacademy.in/user/harsh.t aggarwal


  3. SAFETY STOCK WHEN STOCK OUT COST ARE NOT KNOWN Safety stock reverse to a lower level of stock intended to be maintained all the time as a safety against stock out. The amount of safety stock is to be kept in accordance with the level of service the management aim to achieve. Service Level S = No. of units supplied without delay / Total number of units demanded S 0-1 S % 0-100%


  4. SAFETY STOCK WHEN STOCK OUT COST ARE NOT KNOWN 95 % service level to the customer would mean that 95% of the customer orders on an average are filed out of inventory and 5% of units demanded shall be refused because of stock outs during lead time. When the demand during lead time (DDLT) may be approximated by a normal distribution curve with a certain mean X or ( ) and standard deviation ( ). Then re-order level Where X is average demand during lead time and Z is the standard normal variate whose value depends on the level of service. 0.84 1.28 1.645 2.33 Service Level % 80% 90% 95% 99%


  5. SAFETY STOCK WHEN STOCK OUT COST ARE NOT KNOWN Sesvice Level If Leadt ie s given ken ceviaion


  6. QUESTION For a production system annual consumption 20,000 units. Cost of one unit Rs 4- Ordering Cost Rs 60 / order Inventory Carrying Cost Rs 0.6/ unit/ year Past lead times are 15, 20, 18, 12, 22, 27 day If there are 330 working days in a year Find I. EOQ 2. Safety Stock 3. ROL 4. Average stock in inventory


  7. SOLUTION 2DC 330 163 units 4) Av. Stock = EOQ + SS 2. 33a


  8. THANK YOU