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论文作者:www.51lunwen.org论文属性:本科毕业论文 Thesis登出时间:2015-06-03编辑:felicia点击率:30330
论文字数:15571论文编号:org201505262313039095语种:英语 English地区:英国价格:免费论文
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摘要:对于一个企业而言,工作中掌握良好的工作方法可以有效提高工作效率和工作质量,推动企业的发展。这篇文章就围绕工作方法进行具体阐述。
2.5.3 Unnecessary Transport of Materials
This can be addressed in such a way that machine and assembly workstations are all located in the same footprint on the production floor so that product never had to leave that part of the shop floor from start to finish. This can be effective in minimizing travel distances. The work of cell formation based on product type helped to reduce the transport of materials considerably.
2.5.4 Production of Defective Parts
There is a significant amount of rework generated by production. A couple of changes were made to improve this situation. First, all rework was moved to a central location so the amount of severity and rework could be observed. Prior to this all rework was performed at employee work benches, which hid the magnitude of the problem. Second, standard work was created to better instruct operators on the right way to make parts.
2.5.5 Excess Inventories
An attempt is made to institute a rule to limit inventory in front of all work centers, but inventory still was allowed to pile up in front of certain work centers which takes very less cycle time. Queue management was done in front of the machines where there is a specific place to keep the new incoming work piece to the work center and also for the outgoing finished product to the next location. With the help of these queues it is very easy for the fork lift operator to place the work in the right location. It acts as a visual aid to see if there is enough work available for the machine.
CHAPTER 3
Setup Time Reduction and Flow Improvement
3.1 The Necessity of Determining Time Standards
The determination of time standards in manufacturing is an important aspect of standardization. As production system shifts towards high variety, low volume (HVLV) determining time standards gets more complicated Therefore, it is not surprising to find that most job shops have not attempted to standardize their operations, in most cases operators alone determine their own time standards for their operations. There has been very few successful attempts to determine the correct time standard or develop standardized work for some of the process of the cell. Although acknowledging the inherent nature of products that come from job environments makes it difficult to standardize, it is not an entirely impossible mission to accomplish.
Once the time standard for each operation has been standardized it would be very helpful for a work load balance analysis is to be carried out. Workload balance determines the amount of work that each operator is allocated in the cell. It also shows if an operator and the cell as a whole are able to meet the takt time. Takt time is the maximum time allowed to produce a product in order to meet its demand. Obviously extremes at either end are possible, in which an operator's load is far below or far above takt time.
3.2 Setup Reduction