• Journal of the Society of Naval Architects of Korea
• /
• v.46 no.1
• /
• pp.78-86
• /
• 2009

A capacity calculation and process analysis is a very important part for the entire ship production planning. Ship's production plan is set up with a concept that the product is produced based on the capacity achievable by the processes while general manufacturing sets up the production plan based on product lead-time. Therefore, in case the calculation of capacity for each process of shipbuilding yard is different from actual conditions, a series of production plan - ship table composition, dual schedule plan and execution schedule plan, etc - may accumulate errors, lose reliability of planning information and cause heavy cost deficit in this course. In particular, in case of new shipbuilding yard, stocks between processes are built up and half blocks are not supplied in timely manner, and that is sometimes due to the clumsiness of the operator but it is more often because of the capacity to execute each process is not logically calculated. Therefore, this paper presents the process to calculate the assembly leadtime and assembly process capacity for shipbuilding yard assembly factory. This paper calculated the block type for calculation of assembly lead time based on block DAP(detailed assembly procedure), and introduced cases that calculate production capacities by assembly surface plate by considering the surface plate occupied area of the blocks that change depending on assembly field area and assembly processes through assembly simulation.

• The Korean Journal of Archival Studies
• /
• no.18
• /
• pp.37-89
• /
• 2008

The record management system of the National Assembly was remarkably reformed as 'Record Management Act' was enacted in 1999. At first, the records of the National Assembly had been managed by the general services division, the proceeding division and the stenograph division. But as Record Management Act was enacted, the system was remarkably reformed. 'The National Assembly Archives' was set up for the first time since the National Assembly was established in 1948. In addition, the proceeding division and the stenograph division were set up as 'the National Assembly Record Management Rules' were laid down. In result, The National Assembly Archives took to comprehensively manage records that had been scattered over 'the National Assembly Secretariat', 'the National Assembly Library' and otherwise, and so it had been true to its name. The two changes, the enactment of Record Management Act and the reform of the National Assembly record management system, well show how national records are managed by constitutional institutions. 'Governmental Document Regulations' was enacted ahead of Record Management Act, but there was no obligation to apply it to the National Assembly. But Record Management Act, enacted in the form of 'a law' in 1999, began to be in force even in constitutional institutions and therefore the National Assembly felt the need to take follow-up measures so as to bring the act to effect smoothly. As a part of follow-up measures, the National Assembly set up The National Assembly Archives and reformed the National Assembly Record Management Rules. This study was performed to ascertain how Record Management Act affected the National Assembly, how the National Assembly coped with the act, and how the record management system of the National Assembly changed.

• Proceedings of the ESK Conference
• /
• 1998.04a
• /
• pp.36-39
• /
• 1998

In this study, the postural stresses in automobile assembly tasks were evaluated through an experiment. We had 19 subjects who simulated 42 different working postures occuring in the automobile assembly tasks for1 min and rated their whole body discomforts subjectively. We sued a free modulus magnitude estimation technique, commonly used as a psycophysical rating technique, and fully trained the subjects for the technique. The postures were selected through the analysis of the characteristics of te automobile assembly tasks and the expected difficulties. The subjective discomfort rating data were normalized by min-max standardization method. The consistency of the rating data was guaranteed by the analysis of spear man rank-order. The postures were ranked on their ratings and the relationships between the whole body discomfort ratings, and joint discomfort ratings were analysed. It is expected taht a system for evaluating postural stresses, which was specific to automobile assembly tasks, can be developed based on the relationship and can also be expended to a general purpose system with a minor modification.

• Journal of Industrial Technology
• /
• v.22 no.B
• /
• pp.61-70
• /
• 2002

The shipbuilding scheduling has many possible alternatives because of its long time horizon and a lot of jobs, so it is required that the scheduling system can generate and search feasible alternatives rapidly. The scheduling in the assembly shop is initiated by allocating, namely loading, the assembly blocks to each shop. In this step, the resource capacities (such as available man/hour, available crane) of each shop must be considered. The result of loading without above consideration can make the scheduling result based on that infeasible or worse one. In this paper, we developed the optimal scheduling system of shipbuilding, specifically for loading and scheduling of assembly block, using ILOG Solver/Scheduler. ILOG Solver/Scheduler is a general-purposed commercial software which supports to find a feasible or optimal solution using object oriented technique and constraints satisfaction programming, given constraints and objectives. Also, in order to enhance the system performance, we conducted various experiments of ILOG search strategies. The experimental results showed that the impact of search strategies is significant.

• Journal of the Korean Society for Precision Engineering
• /
• v.20 no.9
• /
• pp.180-187
• /
• 2003

In engineering design environment it is hard to link design data and systems because the types of them are disparate. Therefore, the importance of metadata has increased. Some researches have been executed to develop metadata. But they cannot interact with other metadata and are difficult to extend. The purpose of this paper is to develop a common document structure which represents the general information of mechanical part assembly using XML, and to use it as base documents in order to integrate design data and systems. It is composed of part, assembly and user documents. Part document represents the information of a part independently to part type. Assembly document represents the location of constituent part documents. User document represents user's information. Common documents can be used as a broker between design data and systems, and it can improve the interpretability and reusability of document. We applied the developed common document structure to 2-stage spur gear drive.

• Korean Journal of Computational Design and Engineering
• /
• v.10 no.3
• /
• pp.199-209
• /
• 2005

In this paper, a digital simulation model for an automotive assembly line is constructed by adapting a digital manufacturing methodology. Applied methodology is a simulation for a plant level of the assembly production line. The first significance of this methodology is a validation of the production planning based on various scenarios. The second is pre-verification for the new production plan or production method. The third is a visualization of the production process. Several models were implemented and those models were verified. Then, it was possible to find a most efficient production scenario and production method.

• International Journal of Automotive Technology
• /
• v.7 no.2
• /
• pp.217-226
• /
• 2006

To maintain competitiveness in the modern automotive market, it is important to carry out process planning concurrently with new car development processes. Process planners need to make decisions concurrently and collaboratively in order to reduce manufacturing preparation time for developing a new car. Automated generation of a simulation model by using the integrated process plan database can reduce time consumed for carrying out a simulation and allow a consistent model to be used throughout. In this research, we developed a web-based system for concurrent and collaborative process planning and flow analysis for an automotive general assembly using web, database, and simulation technology. A single integrated database is designed to automatically generate simulation models from process plans without having to rework the data. This system enables process planners to evaluate their decisions quickly, considering various factors, and easily share their opinions with others. By using this collaborative system, time and cost put into the assembly process planning can be reduced and the reliability of the process plan would be improved.

• Bulletin of the Korean Mathematical Society
• /
• v.24 no.1
• /
• pp.57-63
• /
• 1987

이글은 다음의 내용을 다루었다. 1. IMU, (1) IMU조직과 기능, (2) 학술발표회 2. ICM-86, (1) Fields Medal수상, (2) 학술발표회

• Korean Architects
• /
• s.546
• /
• pp.96-99
• /
• 2014

• Korean Architects
• /
• s.629
• /
• pp.105-111
• /
• 2021