Concept explainers
Sassy U makes fashion jeans out of a variety of denim materials that differ in thickness, stiffness, drape, and weave. Customers receive a sampling of product in each type of material before final orders are placed. Each day, bolts of denim cloth received from suppliers wait their turn in the cutting department. The cutting sequence is developed from an algorithm called Johnson’s Rule which examines the time required for spreading the cloth on a cutting table (plus marking the pattern) and the time required for culling it into pattern pieces that will later be sewn together. These times can vary considerably due to number of pattern pieces, pattern placement (matching stripes, for example), cloth thickness, and whether the cutting is to be performed by hand (with an electric knife) or by a CNC textile-cutting machine.
- a. Given the time data below, determine the optimal sequence of denim cloth through the cutting room so that makespan is minimized.
- b. Map out the spreading and cutting processes on a Gantt chart and calculate the makespan.
- c. Using the sequence determined above, when will the stretch denim material leave the cutting room?
Want to see the full answer?
Check out a sample textbook solutionChapter 17 Solutions
Operations and Supply Chain Management, 9th Edition WileyPLUS Registration Card + Loose-leaf Print Companion
Additional Business Textbook Solutions
Operations Management: Sustainability and Supply Chain Management (12th Edition)
Operations Management: Processes and Supply Chains (11th Edition)
Business in Action
Operations Management
Principles of Operations Management: Sustainability and Supply Chain Management (10th Edition)
Operations Management: Processes and Supply Chains (12th Edition) (What's New in Operations Management)
- A student on a medical-surgical unit at a community hospital is currently enrolled in a HIT program at the local university. As part of the requirements for the HIT course, She is required to finish an assignment linking health care interventions and patient outcomes. She returns to her place of employment at night for two weeks to audit patient charts and collect the data she needs for her assignment. She makes copies of the patient records that are particularly helpful and takes them home to write the final paper. Consider the following Has the student violated ethical principles by collecting patient data for a college assignment? Why or Why not?arrow_forwardA process sheet is a type of:Group of answer choices bill of material. route sheet. work order. assembly chart. assembly drawing.arrow_forwardlocal market research fim has just won a contract for several thousand small projects involving data gathering and statistical analysis. In the past, the firm has assigned each project to a single member of its highly trained professional staff. This person would both gather and analyze the data Using this approach, an experienced person can complete an average of 10 such projects in an eight-hour day. The firm's management is thinking of assigning two people to each project in order to allow them to specialize and become more efficient The process would require the data gatherer to fill out a matrix on the computer, check it and transmit it to the statistical analysis program for the analyst to complete. Data can be gathered on one project while the analysis is being completed on another, but the analysis must be complete before the statistical analysis program can accept the new data. After some practice, the new process can be completed with a standard time of 20 minutes…arrow_forward
- A company assembles a product that consists of three pieces called AA, BB, and CC. The AA and BB parts are manufactured by the company itself, while the CC parts are purchased from another manufacturer. The process times, in hours, required for each piece in each of the processes are given in the following table: Process 1 Process 2 Process 3 Process 4 Process 5 AA 1 0.5 0.5 BB 1.5 0.5 0.5 0.5 The company has 20 machines that can carry out process 1, 5 process 2, 10 process 3, 5 process 4 and 5 process 5. Each machine works a maximum of five days each week at a rate of fifty weeks a year , in working days of 8 hours a day. Formulate and solve to determine the maximum number of assembled sets that you can produce.arrow_forwardWhat written materials should the supervisor provide for new letter carriers in light of what Carol Burgess already provides? Carol Burgess is a letter carrier and a part-time trainer of letter carriers for the U.S. Postal Service in a major city on the west coast. She trains all new letter carriers in her service area, which encompasses the northern half of her state. Over the past five years she has trained 318 new letter carriers. Typically,the training is offered prior to the new letter carrier’s entry onto the job, although sometimes it occurs shortly thereafter.The training program typically encompasses both the orientation of new employees to the U.S. Postal Service and the development of specific skills needed by the new letter carrier. The latter involves practice in casing mail (i.e., sorting) to appropriate locations of a case in preparation for delivery,reading maps, determining appropriate sequencing of delivery, and customer relations. The total training program takes…arrow_forwardA catalog order-filling process can be described as follows:12 Telephone orders are taken over a 12-hour period each day. Orders are collected from each person at the end of the day and checked for errors by the supervisor of the phone department, usually the following morning. The supervisor does not send each one-day batch of orders to the data processing department until after 1:00 p.m. In the next step—data processing—orders are invoiced in the one-day batches. Then they are printed and matched back to the original orders. At this point, if the order is from a new customer, it is sent to the person who did the customer verification and setup of new customer accounts. This process must be completed before the order can be invoiced. The next step—order verification and proofreading—occurs after invoicing is completed. The orders, with invoices attached, are given to a person who verifies that all required information is present and correct to permit typesetting. If the verifier has…arrow_forward
- Ted Short, manager of procurement at the Lake Luna Medical Center (LLMC), is starting a process to examine at the general process that is followed at his center for procurement of medical supplies at his facility. His first step is to develop a flowchart for the current process that employees at his center follow. He has asked you to draw that flowchart for him and make any obvious changes to shorten the process. Here are the key steps that are followed: The LLMC employee fills out a paper requisition and sends that to his department head for approval. The department secretary first examines the requisition to see if all needed information is present. If it is, then she sends to the department head for approval. If not, she returns to the employee for any needed corrections. The employee then returns the requisition to the department secretary for review again. Requisitions with the correct information are sent to the department head. The department head reviews the item to determine…arrow_forwardThe following flow chart shows the entire manufacturing process at KD Manufacturing, which consists of six independent operations processes (i.e. sawing, sanding, drilling, reshaping, welding, and assembly). The entire process flow starts with the input of three different parts, Part I, Part II and Part III, each entering a different input line. Three parts meet later for the welding, whichever welding station is available (two identical welding stations work independently). After welding is completed, the product is sent to one of the three assembly stations (which are in parallel). The chart also shows the processing time per unit (in minutes) for each operation. Each of sawing, sanding, drilling and reshaping stations is handled by a different worker. Two workers handle welding, each at one welding station. Another three workers handle the assembly process independently, one at each assembly station. To improve the capacity of the entire manufacturing process, the manager decides to…arrow_forwardWhat are the steps that the single baseline processing software follows?arrow_forward
- Cablesplice, Inc.'s manufacturing process consists of five steps: making con- ductors, adding insulation, adding sheathing, irradiation, and printing and coil cuttingUnits are measured in meters. In 970,000 meters of cable, 700 defects were found in the conductors, and 75,000 defects were found in the insulation. In 440,000 meters of cable, 8,930 defects were found in the sheathing, and no defects were found in the remaining two steps. (a) Find DPU and the dpmo, and (b) the sigma level for each process step.arrow_forwardJoliana is a human resources professional with Odd Objects Company. Her primary responsibility is during the fall is to prepare the customer care center for their seasonal rush. She is tasked with a goal of filling 100 customer support positions by Halloween. She screens candidates and forwards potential fits to the manager of customer care. Jollana is playing a key role in which of the following processes? Multiple Choice human capital shadowing recruiting mentoring inh specificationarrow_forwardThe following are the car repair shop data: Ticket No. Work Ticket No. Work Ticket No. Work 1 Tires 11 Lube & oil 21 Lube & oil 2 Brakes 12 Lube & oil 22 Tires 3 Tires 13 Tires 23 Lube & oil 4 Brakes 14 Brakes 24 Lube & oil 5 Tires 15 Transmission 25 Lube & oil 6 Lube & oil 16 Battery 26 Tires 7 Brakes 17 Lube & oil 27 Battery 8 Brakes 18 Lube & oil 28 Lube & oil 9 Lube & oil 19 Brakes 29 Brakes 10 Battery 20 Lube & oil 30 Tires Click here for the Excel Data File Problem 9-1 Part a (Algo) a. Prepare a check sheet for the above car repair shop data:arrow_forward
- Practical Management ScienceOperations ManagementISBN:9781337406659Author:WINSTON, Wayne L.Publisher:Cengage,