A manufacturing plant 30m by 55 m, has inside 3 stamping machines 5 by 2m and 7 m in height and 37 dollies, 1 m by 1.5 m by 0.25 m. The plant has a requirement that all workers must be 2 m in height. The railings are 1.5m in height and the post to post distance are 1.5 m as well. The walls are designed to have openings, to be used as doors, 0.8cm from the ground on the bottom and 2m from the ground on the top. The fire exits are only written on a white sheet of paper in the wall using a ballpoint pen. The workers are wearing safety shoes and a cloth cap for head protection. All the free areas are painted green to serve as pathway for workers and machines. The workers currently working are 300 persons in total. You are an auditing safety engineer from DOLE. What are your observations? What are compliant and not compliant to BOSH standards. Cite the basis of your answer (what is the Rule No. in OSH Manual) and explain..
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- 1. A company wishes to estimate the profit from two new products. The estimated cost of producing the first product is €3 per unit and it is expected to sell for €5 per unit while the second product costs €5 per unit and is expected to sell for €8 per unit. The first product takes 1 hour of packaging time per day while the second one takes 2 hours of packaging time per day. The time taken for delivery of the first product is 2 hours while the second takes just 1 hour to deliver. The total time available in the packaging and delivery sections is 6 and 8 hours per day respectively. (a) Formulate the linear programming problem. (b) Solve the problem to find the optimum solution. Clearly label and show the feasible solution space on your diagram. (c) Over what range can the coefficient for the first product vary in the objective function before the current solution is no longer optimal? (d) Over what range can the coefficient for the second product vary in the objective function before…William Beebe owns a small shoe store. He has 10 pairs of shoes that requireresoling and polishing. He has a machine that can resole one pair of shoes at atime, and the time required for the operation varies with the type and condition of theshoe and the type of sole that is used. Shoes are polished on a machine dedi-cated tothis purpose as well, and polishing is always done after resoling. His assistant generally does the polishing while Mr. Beebe does the resoling. The resoling and polishingtimes (in minutes) are Shoes Resoling Time Polishing Time1 14 32 28 13 12 24 6 55 10 106 14 67 4 128 25 89 15 510 10 5In what order should the shoes be repaired in order to minimize the total makespanfor these 10 jobs?Data Products, Inc., packages and distributes a variety ofpersonal computer-related products. A time study hasbeen conducted for a job packaging 3.5-inch personalcomputer diskettes for shipment to customers. The jobrequires a packager to place 20 diskettes in a rectangularplastic bag, close the bag with a twist tie, and place thefilled bag into a bin, which is replaced by another workerwhen it is filled. The job can be broken into four basic elements. The elemental times (in minutes) were ob-tained from the time study for 10 job cycles shown in the following table. a. Using an allowance factor of 16%, determine the stan-dard time for this job. b. Determine the number of cycles for this time studysuch that the company would be 95% confident that theaverage time from the time study is within 4% of thetrue average cycle time.
- Tasty Tim’s Tasty Tim’s is a specialty taco restaurant. The following tasks are required for the successful assembly of a Tasty taco (times are in seconds per taco): Chop and trim meat – 30 Chop vegetables – 20 Grill meat – 240 Grill vegetables – 180 Prepare toppings - Lettuce - 10 - Tomato - 15 - Guacamole - 40 Assemble taco - Add meat - 5 - Add vegetables - 5 - Add cheese - 5 - Add toppings - 10 Wrap taco - 20 During the lunch hour, Tasty Tim’s encounters demand for 120 tacos. What is the labor content of one of Tasty Tim’s tacos?Tasty Tim’s Tasty Tim’s is a specialty taco restaurant. The following tasks are required for the successful assembly of a Tasty taco (times are in seconds per taco): Chop and trim meat – 30 Chop vegetables – 20 Grill meat – 240 Grill vegetables – 180 Prepare toppings - Lettuce - 10 - Tomato - 15 - Guacamole - 40 Assemble taco - Add meat - 5 - Add vegetables - 5 - Add cheese - 5 - Add toppings - 10 Wrap taco - 20 During the lunch hour, Tasty Tim’s encounters demand for 120 tacos. A) What is the labor content of one of Tasty Tim’s tacos? B) What is the Takt time (in seconds/unit) takt time for Tasty Tim’s taco shop? C) In an ideal world, how many workers should Tim hire to make tacos? D) During off-peak afternoon hours, demand at Tasty Tim’s drops to 40 tacos each hour. How many employees should Tim schedule to work during the afternoon? Again, ignore any effects of idle time or inefficiency due to poor line balancing.The 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:
- A company is setting up an assembly line to produce 90 units per hour. The table below identifies the work elements, times, and immediate predecessors. Work Element Time (Sec.) Immediate Predecessor(s) A 25 - B 18 A C 20 A D 5 B, C E 12 C F 8 E G 16 D, F H 12 G Use one of the heuristic decision rules described in Table below to balance the assembly line so that it will produce 90 units per hour. Clearly state the decision rule you use and complete the below table using the selected rule. Decision Rule Logic Longest work element Picking the candidate with the longest time to complete is an effort to fit in the most difficult elements first, leaving the ones with short times to “fill out” the station. Shortest work element This rule is the opposite of the longest work element rule because it gives preference in workstation assignments to those work elements that are quicker. It can be tried…5. During the construction of a house, six joists of 24 ft each must be trimmed to the correct length of 23 ft. The operations for cutting a joist involve the following sequence: Operation 1. Place joist on saw horses 2. Measure correct length (23 ft) 3. Mark cutting line for circular saw 4. Trim joist to correct length 5. Stack trimmed joist in a designated area Time (seconds) 15 5 5 20 20 Three persons are involved: Two loaders must work simultaneously on operations 1,2, and 5, and one cutter handles operations 3 and 4. There are two pairs of saw horses on which untrimmed joists are placed in preparation for cutting, and each pair can hold up to three side-by-side joists. Suggest a good schedule for trimming the six joists.3 = noito This work cell will produce 617 units per day (8h x 60 m x 60 se) / 46.67 = 617 Takt time = 140/3 = 46.67 Copyright © 2017 Pearson Education, Ltd. Takt time design Creating plate printing cutting packaging Example: 100 Al-Nojoom Company for advertising has identified the following operations as necessary for the work cell for producing color posters. The customer expects delivery 1000 poster per day, and the work day 10 hours. 1. What is the takt time? Copyright © 2017 Pearson Education, Ltd. 2. How many employees are required? 3. If the number of employees assumed to be 9 employees. Find the quantity of products they able to produce. 4. If the work cell has 4 employees find the Total work time by hours needed to produce 600 units with the same operational time. operation Standard time 21.01 unitnos (min) 1.1 0.9 .75 1.25 1 9-33 sill nG a super 9-34
- A machine shop manufactures two types of bolts. The bolts require time on each of the three groups of machines, but the time required on each group differs, as shown in the table below. Type I Type IIMachine 1 0.2 min 0.2 minMachine 2 0.6 min 0.2 minMachine 3 0.04 min. 0.08 min Production schedules are made up one day at a time. In a day, 300, 720, and 100 minutes are available, respectively, on these machines. Type I bolts sell for 15¢ and type II bolts for 20¢. (a) How many of each type of bolt should be manufactured per day to maximize revenue?(b) What is the maximum revenue?(c) Suppose the selling price of type I bolts began to increase. Beyond what amount would this price have to increase before a different number of each type of bolts should be produced to maximize revenue?b. The Healthy Food Restaurant, a 24-hour restaurant, faces changing requirements from hour tohour. More workers are needed for peak hours, and fewer are needed in between. The followingTable 6 (below) shows the worker requirement for the first 12 hours in the restaurant:Table 6. Staff Requirement at the Healthy Food RestaurantTime Period 10AM11AM12PM1PM2PM3PM4PM5PM6PM7PM8PM9PMRequirement 8 10 12 12 9 7 6 7 9 10 12 8AssignedOn DutyOverstaffed8(i) You are required to apply the first-hour principle to staff each hour with the required number ofcafeteria staff, showing how many staff are on duty each given hour, the number of staffyou have assigned to work each hour and any overstaffing for each hour. i. Schedule the staff to work in 8-hour shifts..A team of 10 unloaders is employed in good reception bay of a large warehouse. During an 8 hour day 40 lorries arrive and it takes the team 10 minutes to unload each lorry. Each team member is paid RM3 per hour and it costs RM10 per hour to keep lorries waiting. Studies show that increasing the team to 14 men would reduce the unloading time to 7 minutes. Would it be worthwhile increasing the team to 14?