EBK PRODUCTION AND OPERATIONS ANALYSIS
EBK PRODUCTION AND OPERATIONS ANALYSIS
7th Edition
ISBN: 9781478628385
Author: Olsen
Publisher: WAVELAND PRESS (ECONTENT)
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Chapter 2.9, Problem 34P

1

Summary Introduction

To calculate: Seasonal factors for each quarter.

Seasonal factors

Seasonal factors help in analyzing a serious of data and they identify all the changes of regular and recurring nature.

2

Summary Introduction

To determine: Deseasonlized time series or demand by using seasonal factors calculated in part 1.

Deseasonalized data

Deseasonalized data represents the continuous data rather than the seasonal data. Dematerialized data is generated by making some adjustments to seasonal data.

3

Summary Introduction

To calculate: The demand for all the quarters of year 4 for deseasonalized series by using six quarters moving average.

Demand forecasting

Demand forecasting is a process in which past data is used to estimate the expected demand of some future period.

4

Summary Introduction

To calculate: Estimated demand for all the quarters of year 4.

Demand forecasting

Demand forecasting is a process in which past data is used to estimate the expected demand of some future period.

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Sam's Pet Hotel operates 51 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $11.00 per bag. The following information is available about these bags: > Demand 95 bags/week > Order cost $52.00/order > Annual holding cost = 25 percent of cost > Desired cycle-service level = 80 percent >Lead time 4 weeks (24 working days) > Standard deviation of weekly demand = 15 bags > Current on-hand inventory is 320 bags, with no open orders or backorders. a. Suppose that the weekly demand forecast of 95 bags is incorrect and actual demand averages only 75 bags per week. How much higher will total costs be, owing to the distorted EOQ caused by this forecast error? The costs will be $ higher owing to the error in EOQ. (Enter your response rounded to two decimal places.)
Sam's Pet Hotel operates 50 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $10.50 per bag. The following information is available about these bags: > Demand = 95 bags/week > Order cost = $55.00/order > Annual holding cost = 35 percent of cost > Desired cycle-service level = 80 percent > Lead time = 4 weeks (24 working days) > Standard deviation of weekly demand = 15 bags > Current on-hand inventory is 320 bags, with no open orders or backorders. a. Suppose that the weekly demand forecast of 95 bags is incorrect and actual demand averages only 75 bags per week. How much higher will total costs be, owing to the distorted EOQ caused by this forecast error? The costs will be $ 10.64 higher owing to the error in EOQ. (Enter your response rounded to two decimal places.) b. Suppose that actual demand is 75 bags but that ordering costs are cut to only $13.00 by using the internet to automate order placing. However, the buyer does…
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