
Concept explainers
An electrical contractor’s records during the last five weeks indicate the number of job requests:
Predict the number of requests for week 6 using each of these methods:
a. Naive
b. A four-period moving average
c. Exponential smoothing with α = .30; use 20 for week 2
a)

To forecast: The number of requests for week 6 using naïve approach.
Introduction: Forecasting is the planning process that helps to predict the future aspects of the business or operation using present or past data. It uses certain assumptions based the knowledge and experience of the management.
Explanation of Solution
Given information:
Given that an electrical contractor had the following job requests during the last five weeks
Forecast the number of requests for week 6 using the naïve approach as shown below.
Given that the number of job requests for week 5 was 22, the likely job requests for week 6 would also be 22.
b)

To forecast: The number of requests for week 6 using a four-period moving average.
Introduction: Forecasting is the planning process that helps to predict the future aspects of the business or operation using present or past data. It uses certain assumptions based the knowledge and experience of the management.
Explanation of Solution
Given information:
Given that an electrical contractor had the following job requests during the last five weeks
Forecast the number of requests for week6 using a four period moving average as shown below.
Substitute the values to obtain the forecast for week 6 as shown below.
The forecast for week6 would be 20.75
c)

To forecast: The number of requests for week 6 using a exponential smoothing.
Introduction: Forecasting is the planning process that helps to predict the future aspects of the business or operation using present or past data. It uses certain assumptions based the knowledge and experience of the management.
Explanation of Solution
Given information:
Given that an electrical contractor had the following job requests during the last five weeks
Forecast the number of requests for week6 using exponential smoothing as shown below.
Forecast the number of requests for week 6 using an exponential smoothing methodology, given that the forecast for week 2 was 20 and the actual job requests in week 2 was 22, and the exponential smoothing constant
- Given the week 2 forecast was 20, the actual number of jobs in week2 was 22 and the smoothing constant α was 0.3, prepare a forecast for week 3 as shown below.
Therefore, forecasted week3 job requests 20.6.
- Given the week3 forecast was 20.6, the actual number of jobs was 18 and the smoothing constant α was 0.3, prepare a forecast for week4 as shown below.
Therefore, forecasted week4 job requests 19.82.
- Given the week4 forecast was 19.82, the actual number of jobs was 21 and the smoothing constant α was 0.3, prepare a forecast for week5 as shown below.
Therefore, forecasted week5 job requests 20.17.
- Given the week5 forecast was 20.17, the actual number of jobs was 22 and the smoothing constant α was 0.3, prepare a forecast for week 6 as shown below.
Therefore, the forecast for week 6 would be 20.72.
Want to see more full solutions like this?
Chapter 3 Solutions
OPERATIONS MANAGEMENT(LL)-W/CONNECT
- Do you feel there is anything positive about rework?arrow_forwardDo you think technology can achieve faster setup times? How would it be implemented in the hospital workforce?arrow_forwardIn your experience or opinion, do you think process changes like organizing workspaces make a bigger difference, or is investing in technology usually the better solution for faster setups?arrow_forward
- Have you seen rework done in your business, and what was done to prevent that from occurring again?arrow_forwardResearch a company different than case studies examined and search the internet and find an example of a business that had to rework a process. How was the organization affected to rework a process in order to restore a good flow unit? Did rework hurt a process or improve the organization's operational efficiency? • Note: Include a reference with supportive citations in the discussion reply in your post.arrow_forwardSetup time is very important in affecting a process and the capacity of a process. How do you reduce setup time? Give examples of reducing setup time. Please Provide a referenecearrow_forward
- Do you think TPS was successful? If so, how? Are there other companies that have used TPS? If so, give examples. Please provide a referencearrow_forwardGiven the significant impact on finances, production timelines, and even equipment functionality, as you pointed out, what do you believe is the most effective single strategy a company can implement to significantly reduce the occurrence of rework within their operations?arrow_forwardDurban woman, Nombulelo Mkumla, took to social media last week to share how she discovered the rodent.In a lengthy Facebook post, she said she purchased the loaf of bread from a local shop after work on August 27.For the next days, Mkumla proceeded to use slices of bread from the load to make toast."Then, on the morning of August 31, I took the bread out of the fridge to make toast and noticed something disgusting andscary. I took a picture and sent it to my friends, and one of them said, 'Yi mpuku leyo tshomi' [That's a rat friend]“."I was in denial and suggested it might be something else, but the rat scenario made sense - it's possible the rat got into thebread at the factory, and no one noticed," Mkumla said.She went back to the shop she'd bought the bread from and was told to lay a complaint directly with the supplier.She sent an email with a video and photographs of the bread.Mkumla said she was later contacted by a man from Sasko who apologised for the incident.According to…arrow_forward
- PepsiCo South Africa says the incident where a woman discovered part of a rodent in her loaf of bread, is anisolated occurrence.Durban woman, Nombulelo Mkumla, took to social media last week to share how she discovered the rodent.In a lengthy Facebook post, she said she purchased the loaf of bread from a local shop after work on August 27.For the next days, Mkumla proceeded to use slices of bread from the load to make toast."Then, on the morning of August 31, I took the bread out of the fridge to make toast and noticed something disgusting andscary. I took a picture and sent it to my friends, and one of them said, 'Yi mpuku leyo tshomi' [That's a rat friend]“."I was in denial and suggested it might be something else, but the rat scenario made sense - it's possible the rat got into thebread at the factory, and no one noticed," Mkumla said.She went back to the shop she'd bought the bread from and was told to lay a complaint directly with the supplier.She sent an email with a video and…arrow_forwardDurban woman, Nombulelo Mkumla, took to social media last week to share how she discovered the rodent.In a lengthy Facebook post, she said she purchased the loaf of bread from a local shop after work on August 27.For the next days, Mkumla proceeded to use slices of bread from the load to make toast."Then, on the morning of August 31, I took the bread out of the fridge to make toast and noticed something disgusting andscary. I took a picture and sent it to my friends, and one of them said, 'Yi mpuku leyo tshomi' [That's a rat friend]“."I was in denial and suggested it might be something else, but the rat scenario made sense - it's possible the rat got into thebread at the factory, and no one noticed," Mkumla said.She went back to the shop she'd bought the bread from and was told to lay a complaint directly with the supplier.She sent an email with a video and photographs of the bread.Mkumla said she was later contacted by a man from Sasko who apologised for the incident.According to…arrow_forwardRead the project statement and answer ALL of the questions that follow PROJECT STATEMENT The African Integrated High-Speed Railway Network (AIHSRN). African nations are preparing to invest billions in a significant overhaul of their rail infrastructure as part of an ambitious plan for the continent. One of the key projects underway is the African Integrated High-Speed Railway Network (AIHSRN), which aims to connect Africa's capital cities and major commercial centres with a high-speed railway network to enhance continental trade and competition. This network will span 2,000 km (1,243 miles) and connect 60 cities, including Nairobi, Lagos, Cairo, and Dakar. It will improve access to essential markets, enhance economic cooperation, and encourage regional collaboration. The plan is poised to revolutionise intra-African trade by reducing travel times and lowering transportation costs, making trade between African nations more competitive. The trains will be capable of reaching speeds of up…arrow_forward
- Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,MarketingMarketingISBN:9780357033791Author:Pride, William MPublisher:South Western Educational PublishingContemporary MarketingMarketingISBN:9780357033777Author:Louis E. Boone, David L. KurtzPublisher:Cengage Learning

