Operations Management Home Work Case Solution And Analysis, HBR Case Study Solution & Analysis of Harvard Case Studies

Question 1

What would be the bottleneck resource?

The bottleneck resource is identified below:

BOTTLENECK IDENTIFICATION
Average Truck Delivery	75	bbls
Barrels of berries at peak harvest	19000
Number of trucks	253.3
Total Hours	12	Hours
Trucks per hour	21.1
Minutes per truck arrival	2.8	Minutes
Barrels per minute	26.4

26.4 barrels per minutes x 70% wet berry ratio	18.5
26.4 barrels per minutes x 30% dry berry ratio	7.9

Plant Capacity (wet berries )	600BBS/hour=	10	bbls/min
Plant Capacity (Dry berries)	1500bbs/hour=	25

Dry berries arrival	7.92	< 25	No Bottleneck
Wet berries arrival	18.47	> 10	Bottleneck
Total wet berries	13300
Wet berries plant capacity	600	bbls/hour
Total time required in 1 day to complete 19000 barrels	22.17	hours

Question 2

What would be the plant’s process capacity?

The process capacity for the shown below:

PLANT'S PROCESS CAPACITY
RESOURCE POOL	EFFECTIVE CAPACITY,BBLS/HR
Dumping Capacity
Kiwanee dumpers	5
Avg time to dump	7.5	minutes
Avg weight in trucks	75	bbls
Total dumping capacity	3000
Holding Capacity
Total holding (1-16)	4000
Total Holding (17-24)	2000
Total Holding (25-27)	1200
DE stoning Capacity
Total de-stoning capacity	4500
DE chaffing capacity
Total de-chaffing capacity	4500
Separator Capacity
No. of Separator units	3
Total separator capacity	1200
Bagging station capacity
Maximum output each day	8000	bbls
Total capacity	667	bbls/day
Bulk bin loading capacity
No. of loaders for bulk bin	4
Total capacity	800	bbls/day
Bulk truck loading capacity
No. of loaders of bulk trucks	2
Total capacity	2000	bbls/day
TOTAL PLANT PROCESS CAPACITY	23867	bbls/day

Question 3

Assuming that 12,600 wet berries arrive per day (over a 12 hour day from 7am to 7pm) – does the time at which the plant finishes processing the last wet berry change? Why?

If we assume that the total wet berries arriving per day is reduced to 12600 from 13300 as previously calculated, then based upon the plant capacity of 600 bbls per hour, the time when the last wet berry is processed is changed and it is decreased as seen below.

Total wet berries arriving per day (assumed)	12600
Wet berries plant capacity	600
Total time required in 1 day to complete 19000 barrels	21.00	hours

The reason for this is that the bottleneck has been reduced from the process to a certain extent. It is the bottleneck of the process, which is causing delay in the processing of the wet berries at peak time period. The management needs to take steps to remove this bottleneck from the process for instance, the holding bin at level 1 (17-24) should be converted into the wet berries and should not include the dry berries. Another recommendation for the management is to invest over the temporary storage and in this manner to reduce the truck wait time by 0-20 minutes. The mangement needs to improve the scheduling of the process so that the bottleneck is reduced and utilization is increased for the complete process.

Escort Service

Question 1

On average, what fraction of the time is the escort busy? That is, if a student calls, what is the likelihood that the escort is currently occupied with another student?

Standard Deviation for Call Receiving	15	Minutes
Standard Deviation for picking & dropping a student	15	Minutes

Total Available Time	1440	Minutes
Escort Busy Time	15	Minutes
Maximum fraction of escort busy time of total time	2.08%
Minimum fraction of escort busy time of total time	0.00%
Average fraction of escort busy time of total time	1.04%

Question 2

How much time does it take, on average, from the moment a student calls for an escort to the moment the student arrives at her/his destination?

Escort Busy Time	15	Minutes
Average time to pick & drop a student	15	Minutes
Standard deviation for picking & dropping a student	15	Minutes
Maximum average time from student calling & arriving at his destination	45	Minutes
Minimum average time from student calling & arriving at his destination	15	Minutes
Average time from student calling & arriving at his destination	30	Minutes

Question 3

Suppose that the escort service purchases a scooter that the escort can use to pick-up and transport students. This reduces the average amount of time it takes for him to pick up and transport a student to 5 minutes, although the coefficient of variation of this time remains 1. Under this new system, how much time does it take, on average, from the moment a student calls for an escort to the moment the student arrives at her/his destination?

Operations Management Home Work Case Solution

Escort Busy Time	5	Minutes
Average time to pick & drop a student	5	Minutes
Standard deviation for picking & dropping a student	5	Minutes
Maximum average time from student calling & arriving at his destination	15	Minutes
Minimum average time from student calling & arriving at his destination	0	Minutes
Average time from student calling & arriving at his destination	15	Minutes

Operations in Workplace

Question 1

Briefly describe your current job or most recent job/position – what are your responsibilities and how would you describe your contribution in the ‘value added transformations’ within your organization..............

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