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Logistics (17 tasks)
Refunds: 0
Uploaded: 09.06.2013
Content: 30609163521267.zip 119,18 kB
Product description
Task №1
To choose the individual data of the following limits:
lot size parts n = (2 ÷ 8) pcs .;
norm piece of time from operations: t1 = (2 ÷ 6) min / pcs .; t2 = (4 ÷ 8)
min / pcs .; t3 = (3 ÷ 6) min / pcs .; t4 = (2 ÷ 7) m / pc.
Required
1. Plot the processing party objects to transactions in different types of traffic Party objects Operations: serial, parallel, serial to parallel (mixed).
2. Determine graphically and analytically T - the duration of treatment of the party items for all transactions in different types of traffic Party items on operations and other parameters of graphs, such as mikroprostoi on operations in parallel as the motion of objects on party operations.
3. Outline the advantages and disadvantages of each type of traffic Party objects to transactions.
4. Specify the scope of each type of traffic Party objects to transactions.
5. Select the best example for your kind of traffic Party items on transactions and justify the choice.
6. Specify the assignment of the selected type of traffic Party items on transactions, particularly where and what it is used.
7. Determine the type of movement for the selected party objects to transactions start and end dates batch processing items on each transaction.
Problem №2
Independently establish individual baseline data needed to solve the problem of determining the optimal sequence start party objects to the processing method of Johnson, focusing on their limits in Table. 4. Calculate the total length of the chain by the production cycle of processing batches of objects of all kinds at an optimal sequence. To calculate the duration of the treatment of the parties objects on operations tpij use formula
.....
Problem №3
Independently establish individual baseline data needed to address the problem of determining the optimum sequence of start processing batches of subjects by Petrov-Sokolitsyna, focusing on their limits in Table. 6. Items with the same or similar routes processing operations.
Calculate the chain method Tts.s - the total duration of the production cycle of processing batches of objects of all kinds for each variant sequence start ......
Problem №4
1) production and assembly of parts - a set of interrelated activities
2) the duration of each treatment:
turning operation - 15 minutes
milling operations - 7 min
Boring - 3 minutes
Problem №5
Initial data
Given the network schedule set of interrelated activities, shown in Fig. 2.
Required
1. Calculate tcr - the duration of the critical (maximum full) path.
2. Determine the critical zone of the network schedule - a complex of works belonging to the critical and sub-critical paths. Subcritical way in duration less than the critical path is not more than (15 - 20)% .....
Task №6
ONPL organized as a continuous conveyor working in increments of 1 m. The jobs are arranged on both sides of the conveyor in a staggered manner, the distance between adjacent workstations on one side is 4 m. The number of transactions in the ONPL 40. The line works in two shifts, each hour - regulated a break of 5 minutes. During the day, scheduled to be released in 1200 products ....
Task №7
With ONPL a continuous working of the conveyor must be released in the planning period (21 days) of 18,000 products. The conveyor belt moves at a constant speed of 2 m / min. Blue moved behind the conveyor belt, and then returning to the beginning of the working zone at a speed of 4 km / h. Work zones are separated by transport zones of 1.5 m. Each. On the assembly line runs 55 operations. Organized by the 5 journeys of 4 m each. Regulated time off the assembly line - 5 minutes. every hour ....
Task №8
Assembly of products carried on ONPL a distribution conveyor with a continuous motion. P
Additional information
Objective number 9
For machining organized odnopredmetnaya discontinuous production line (OPPL), on which the six process steps (single-piece set of students on their own time at specified intervals, min / pcs.): T1 = 2-4; t2 = 5-7; t3 = 7-9; t4 = 10-15; t5 = 5-8; t6 = 0,5-1,5.
OPPL working in one shift, equipment maintenance is performed after hours. Quarterly release program of details set in the amount of 5074 pieces. In the quarter, the planned 54 days. The turnover period OPPL is a change .....
Problem №10
For Retailers need to buy three TVs, the original data which are shown in Table. 13.
Determine: the optimal batch size deliveries TV, the number of orders for a month, variable costs for storage. The results are summarized in a table. 5
Table 5
Problem №11
Daily consumption of materials in the range of 100 to 300 units. Supplier replenishes the stock of materials in batches of 2100 pieces. Delivery time - 7 days. You want to calculate the reorder point, safety stock and maximum stock of materials that may be out of stock. Solution of the problem illustrated graphically. Respond to the question of how should change the model parameters, if the intensity of consumption of 400 units. in a day.
Problem №12
Under a contract with the supplier party supplies raw materials to the company should be in the range of 100 to 200 m., And the delivery time is 5 working days. Required to determine the range of changes in the intensity of consumption of raw materials and the capacity of his company stock, if deliveries are made at intervals of 20 days. Calculate the value of the current batch of raw material supply, if the average rate at the time of the order of 20% higher than the minimum, and the current balance of materials in stock at this time was 80 m. The decision illustrate graphically.
Problem №13
4 days before the next delivery date, the company has made an application for 3000 pieces. At this point, the rest of components in stock of 80 pcs., And the intensity of consumption - 10 pcs. in a day. Required to determine the total storage capacity and rhythm of deliveries, if the minimum rate is twice lower than the maximum.
Problem №15
The transport network enterprise consists of a motor unit (A), and transport and supply complex (D). On the market there are four user (B1, B2, B3, B4), the volume of supply to each customer are listed in Table. 22. The matrix of distances (tab. 23) shows the distance from the object of the transport network to consumers. The time spent on a single trip are shown in Table. 24. It is further known: while the vehicle on the route of T = 460 min .; Technical vehicle speed v = 20 km / h .; easy loading and unloading of tpr = 30 minutes.
Define rational radial route and to schedule the delivery of products to customers. The decision to submit a consolidated routing statements (Table
Problem №16
1. Build a graph and calculate the timing and launch timing for the release of all departments with the following information:
the party details are processed sequentially in the five departments;
average daily demand for details on the assembly is 15 pcs. / Day.
The answer is to bring in a schedule and the completed table (Table. 11):
Problem №17
Build a graph and calculate the current backlog between pairs of adjacent shops, using the following data:
the party details are processed sequentially in the five departments;
average daily demand for details on the assembly is 15 pcs. / Day.
The answer is to bring in a schedule and the completed table (Table. 12):
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