• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.5 no.6
• /
• pp.69-78
• /
• 1982

Traditional CVP (Cost-Volume-Profit) analysis employs linear cost and revenue functions within some specified time period and range of operations. Therefore CVP analysis is assumption of constant labor productivity. The use of linear cost functions implicity assumes, among other things, that firm's labor force is either a homogenous group or a collection homogenous subgroups in a constant mix, and that total production changes in a linear fashion through appropriate increase or decrease of seemingly interchangeable labor unit. But productivity rates in many firms are known to change with additional manufacturing experience in employee skill. Learning curve is intended to subsume the effects of all these resources of productivity. This learning phenomenon is quantifiable in the form of a learning curve, or manufacturing progress function. The purpose d this study is to show how alternative assumptions regarding a firm's labor force may be utilize by integrating conventional CVP analysis with learning curve theory, Explicit consideration of the effect of learning should substantially enrich CVP analysis and improve its use as a tool for planning and control of industry.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2022.06a
• /
• pp.357-358
• /
• 2022

Seafarers from 21 APEC economies, are not only an indispensable source of human capital for the global maritime industry, covering at least 56% of the world's seafaring population (BIMCO, 2015), but also pivotal in providing support to their economies as a major industrial pillar, specifically in developing economies where the development of skills and enhancement of labor mobility of human resources is essential in creating sustainable and inclusive regional growth. This paper examines challenges and barriers in seafarer mobility in relation to policies in APEC economies and investigates mutual collaborative actions that can be taken to address the issues identified in a coordinated and harmonised manner.

• Proceedings of the Safety Management and Science Conference
• /
• 2009.11a
• /
• pp.125-144
• /
• 2009

Korean logistics industry have been focused on transportation business. However, with the expansion of the electronic commerce and on-line shopping, delivery service is now dramatically growing. Despite the expansion of logistics market, the domestic logistics industry have significant structural problems such as low productivity comparing with the advanced countries, relatively high cost and shortage of human resources and lack of professionalism of people in the industry. Logistics companies reallocate employees, use subcontractors, expand consignment and training the employees to overcome the labor shortages but it has some limits. In recognition of the importance of labor in the logistics industry, financial support and investment have increased. Logistics companies tend to hire consultants, set up logistics department or R&D center in order to establish highly productive logistics process and system so it is viewed that there will be considerable demands of human resources in the logistics industry. This study indicates implications and development direction of human resources in the logistics industry by looking into prospect and characteristic of the industry, employment status, training programs and qualification requirements.

• Journal of Korean Society of Forest Science
• /
• v.96 no.4
• /
• pp.401-407
• /
• 2007

This study analyzed an economic efficiency of oak mushroom cultivation in order to provide data needed for formulating related policies. 88 farmhouses in major producing areas were interviewed with. The average production cost per 100 bed-logs was 151,699 won. Among production costs, material costs accounted for 56.0% and labor costs 41.8%. Oak mushroom cultivation was labor-intensive and labor input was a significant factor determining the production costs. There was 3 7.2% gap in production costs between Chungbuk, the highest cost area and Gyeonggi, the lowest cost area of oak mushroom due to difference in labor input. Average revenue per 100 bed-logs was 178,627 won. Average income per 100 bed-logs, which is variable production costs of 116,613 won subtracted from the revenue, was 62,014 won and thus income rate was 34.7%. Income rate in Jeonbuk, the highest area, was higher than that in Gyeonggi, the lowest area, by 15.8% points due to difference in quantities produced, grade, and variable production costs, in particular, labor costs. The result of the economic analysis indicates that reduction in establishment and labor costs, accounting for the highest portion in production costs is priority issue for the enhancement of the competitiveness of the oak mushroom industry.

• Korean Journal of Agricultural Science
• /
• v.45 no.2
• /
• pp.298-307
• /
• 2018

The aim of this study was to enhance the value of the chestnut industry by analyzing the value chain structure. Based on the value chain theory, it is divided into primary activities and support activities. Thus, in total, 27 subjects from Gongju, Buyeo, and Cheongyang were interviewed and self-administered questionnaire. Regarding the value chain structure of the chestnut industry, the primary activities consisted of production followed by cultivation and storing, sorting and packaging, transportation and marketing sales. The support activities were divided into production infrastructure, policy, R&D, and systematization. The primary activities are able to maximize profits through cost reductions. The production was divided into general and environmentally friendly cultivation. Depending on the labor force, it is family-centered labor. However, the installation of harvest nets depends on a hired labor force (40 - 60%) such that it would be necessary to have a mechanized harvest to replace the manpower for the cost reduction. Transportation, marketing sales, and backdoor selling (38.1%) were higher than the existing channels (31.0%) using the National Agricultural Cooperative Federation. The enhancement of value could be created by maximizing profits through the reinforcement of the links between each subject. The production showed strong connections with cultivation/storing, sorting/packing, and backdoor selling and the National Forestry Cooperative Federation. The processing stage is a very simple structure, it would be necessary to have R&D and to support promotions, infrastructure, machines, and sales increases, which should be expanded by connections with other industries like the food industry.

• Korean Journal of Plant Resources
• /
• v.15 no.1
• /
• pp.72-76
• /
• 2002

This study was carried out to determine an effective mechanical harvester for rhizomes of Rehmannia glutinosa Libosch. Labor-saving efficiency showed 69∼76% by using tillage operations with power tiller, digger attached to power tiller, and digger attached to tractor compared with manual harvest. Loss percentage of rhizomes by mechanical harvesters was 3.1∼ 9.3% higher, and fresh rhizome yield was 2∼6％ lower than that by manual harvest, respectively. Although it showed higher loss percentage of rhizomes and lower fresh rhizome yield compared with manual harvest, mechanical harvest using digger attached to power tiller or digger attached to tractor was effective in labor-saving for rhizomes of Rehmannia glutinosa Libosch.

• Journal of Wellbeing Management and Applied Psychology
• /
• v.2 no.1
• /
• pp.9-19
• /
• 2019

The uniqueness of labour as a factor of production is that labour services cannot be separated from the employee. However, since the object of sale is only the services of the employee, not an employee himself, the labour conditions, determined by the labour and collective agreements or other agreements concluded at other levels and within the current legislation, are equally important. Speaking as a subject of labour, a person can realize his or her labour potential by the way of self-employment, that means to act as an independent producer seller of their products. Another way of labour potential realization is hiring, that means offering of the services as a hired employee to the employer, who is the subject of ownership. In this case there is an exchange under the principle: qualification and working time of the worker - for wages and profits. Each enterprise is confronted with a set of goals, among them - economic and social leadership. For their achievement the company uses all the available arsenal of resources - material, land, financial, labour. This indicates the equivalence of all types of resources in achieving the goal. But this is not quite true, because every resource can be included in production only through the activity of labour and people. And this activity depends on the attitude of the company to its employees, the degree of their motivation and stimulation.

• Industry Promotion Research
• /
• v.8 no.3
• /
• pp.111-123
• /
• 2023

The purpose of this study is to examine the structural relationship and confirm the effect of labor as a civil servant in charge of civil affairs how excessive social support and delayed tension affect psychological exhaustion. The results are as follow. First, as a result of analyzing the structural relationship between Emotional Labor, social support, perceived stress, and psychological exhaustion of Civil Affairs Officials, Emotional Labor of civil Civil Affairs Officials has a positive effect on social support, perceived stress, and psychological exhaustion. Social support had a significant negative effect on psychological exhaustion. Perceived stress was found to have a positive effect on psychological exhaustion. Second, as a result of soldering the labor effect of social support and involved tension in the relationship between labor and psychological burnout of public officials in charge of financial resources, a partial mediating effect was confirmed.The object should be used to first respond to and show the reinforcement of social support and the reduction of painted pressure, identified as labor variables, before farmers appear.

• International conference on construction engineering and project management
• /
• 2005.10a
• /
• pp.881-885
• /
• 2005

Scheduling repetitive projects under limitations on the amounts of available resources (labor and equipment) has been an active subject because of its practical relevance. Traditionally, the limitation is specified as a deterministic (fixed) number, such as 1000 labor-hours. The limitation, however, is often exposed to uncertainty and variability, especially when the project is lengthy. This paper presents a stochastic optimization model to treat the situations where the limitations of resources are expressed as probability functions in lieu of deterministic numbers. The proposed model transfers each deterministic resource constraint into a corresponding stochastic one and then solves the problem by the use of a chance-constrained programming technique. The solution is validated by comparison with simulation results to show that it can satisfy the resource constraints with a probability beyond the desired confidence level.

• Journal of the Korea Convergence Society
• /
• v.8 no.6
• /
• pp.291-297
• /
• 2017

As part of the target-specific convergence study of welfare focusing on the relationships between emotional labor, burnout, and goal-focused self-regulation, this study was designed to examine whether goal-focused self-regulation of the early childhood teachers buffers in the relation between emotional labor and burnout. A total of 231 childcare teachers participated in this study and by responding to a questionnaire including measures of emotional labor, burnout, and goal-focused self-regulation. Moderated multiple regression through simultaneously entry was performed for analysis using SPSS (PASW) 18.0 and PROCESS Macro for SPSS. First, the results indicated that the level of emotional labor increase, burnout of the early childhood teachers also increase. Second, goal-focused self-regulation was found to have a protective function in terms of buffering the negative effect of emotional labor on burnout. Based on the results, this study suggests the importance of mental healthcare and the need for internal resources development such as self-regulation.