• 제목/요약/키워드: Task planning system

검색결과 227건 처리시간 0.031초

A Systematic Approach Of Construction Management Based On Last Planner System And Its Implementation In The Construction Industry

  • Hussain, SM Abdul Mannan;Sekhar, Dr.T.Seshadri;Fatima, Asra
    • Journal of Construction Engineering and Project Management
    • /
    • 제5권2호
    • /
    • pp.11-15
    • /
    • 2015
  • The Last PlannerSystem (LPS) has been implemented on construction projects to increase work flow reliability, a precondition for project performance againstproductivity and progress targets. The LPS encompasses four tiers of planning processes:master scheduling, phase scheduling, lookahead planning, and commitment / weeklywork planning. This research highlights deficiencies in the current implementation of LPS including poor lookahead planning which results in poor linkage between weeklywork plans and the master schedule. This poor linkage undetermines the ability of theweekly work planning process to select for execution tasks that are critical to projectsuccess. As a result, percent plan complete (PPC) becomes a weak indicator of project progress. The purpose of this research is to improve lookahead planning (the bridgebetween weekly work planning and master scheduling), improve PPC, and improve theselection of tasks that are critical to project success by increasing the link betweenShould, Can, Will, and Did (components of the LPS), thereby rendering PPC a betterindicator of project progress. The research employs the case study research method to describe deficiencies inthe current implementation of the LPS and suggest guidelines for a better application ofLPS in general and lookahead planning in particular. It then introduces an analyticalsimulation model to analyze the lookahead planning process. This is done by examining the impact on PPC of increasing two lookahead planning performance metrics: tasksanticipated (TA) and tasks made ready (TMR). Finally, the research investigates theimportance of the lookahead planning functions: identification and removal ofconstraints, task breakdown, and operations design.The research findings confirm the positive impact of improving lookaheadplanning (i.e., TA and TMR) on PPC. It also recognizes the need to perform lookaheadplanning differently for three types of work involving different levels of uncertainty:stable work, medium uncertainty work, and highly emergent work.The research confirms the LPS rules for practice and specifically the need to planin greater detail as time gets closer to performing the work. It highlights the role of LPSas a production system that incorporates deliberate planning (predetermined andoptimized) and situated planning (flexible and adaptive). Finally, the research presents recommendations for production planningimprovements in three areas: process related, (suggesting guidelines for practice),technical, (highlighting issues with current software programs and advocating theinclusion of collaborative planning capability), and organizational improvements(suggesting transitional steps when applying the LPS).

Development of a Guide Robot with Real-Time Linux OS

  • Mun, Jun-Hak;Seo, Gon-Yeon;Kim, Jin-Oh
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2001년도 ICCAS
    • /
    • pp.137.1-137
    • /
    • 2001
  • A new method for a guide robot using Real-Time Linux OS is introduced in this paper. A guide robot is to guide people in museums or buildings. So it has to be more reliable and stable in its control system. In addition, it has to satisfy Real-Time operation requirement because it needs to react to changing environment prompty. The task includes localization, map building, collision avoidance, path planning, and user interface software. The modular guide robot is designed with Real-Time Linux OS, which is composed of many open sources for scheduler, interrupt dispatcher, fifos, shared memory, timer services. We developed application software to satisfy the given task. The developed guide robot moves at 0.2ms and the interrupt latency is less than 100$\mu\textrm{s}$ It is thought that the developed system can be a stable and low cost open architecture robot controller for ...

  • PDF

프로세스 기반의 조직 구성을 위한 요건 도출 방안 연구 (The requirement deduction plan research for the organization composition of process base)

  • 홍선호;김영태;임경미
    • 한국철도학회:학술대회논문집
    • /
    • 한국철도학회 2009년도 춘계학술대회 논문집
    • /
    • pp.360-364
    • /
    • 2009
  • To verify the suitability of the Railroad safety requirements analysis, the actions of the function which it follows in a given operation condition are composed of the rule model or the state model. And it test must be possible. The subject of condition transfer in compliance with the transfer condition which is an event of system it will be able to accomplish the operation of system. However, tasks allocated to the actor are the duty which is added in organization. This time, the start of duty task is started in compliance with an external or internal condition. If there are 9 tasks which have one objective, the relationship among the previous and the current internal tasks and next tasks which will given is able to show in logical model. Thus when planning an organization, the integral part of class must include Task, Role and Position. And this time we make a series of outputs of examination of organizing model and examples to meet the capable skill.

  • PDF

X-Plane 및 MATLAB/Simulink 기반의 복수무인기 모의실험 시스템 개발 (Implementation of a X-Plane and MATLAB/Simulink based Simulation System for Multiple UAVs)

  • 문상우;오은미;유동일;심현철
    • 제어로봇시스템학회논문지
    • /
    • 제19권5호
    • /
    • pp.442-449
    • /
    • 2013
  • In this paper, a simulation system based on X-Plane and MATLAB/Simulink for multiple UAVs is presented. For the conceptual design of this proposed system, a hierarchical system architecture for multiple UAVs is presented. This architecture has object-oriented data structure which consists of three objects (UAV status, mission and task, and environment) and a hierarchy consisting of four layers (decision making layer, task assignment layer, path and motion planning layer, and collision avoidance layer) is also proposed. In addition, this paper shows a implementation of simulation system based on the proposed system architecture using X-Plane and MATLAB/Simulink. The result of simulation from the developed system in this paper validate capability of application for multiple UAVs in real environment.

공간 배치를 위한 혼합현실 기반의 인터페이스 (A Mixed Reality Based Interface for Planing Layouts)

  • 강현;이건;손욱호
    • 한국HCI학회논문지
    • /
    • 제2권2호
    • /
    • pp.45-51
    • /
    • 2007
  • 공장 내 생산설비 배치나 건물 내 인테리어 디자인에서, 생산성 및 전체 디자인을 손상하지 않고 장비들을 신규 도입 혹은 재배치하는 것은 고비용의 작업이다. 이러한 실제 물체들을 가상공간에서 배치 시뮬레이션 하기 위한 방법으로 본 논문에서는 혼합현실 기반의 인터페이스를 제안한다. 제안된 인터페이스는 공장 내 생산설비 배치를 위한 시뮬레이션 알고리즘이 적용되었다. 제안된 인터페이스의 하드웨어는 이동식의 PC 플랫폼위에 사용자 입력을 위한 터치스크린과 비디오카메라가 장착되어 영상을 실시간적으로 보여주는 디스플레이(video see-through display) 를 사용한다. 가상물체와 실제물체가 정교히 합성된 혼합 현실 영상에서 터치 입력을 통해 가상 물체들을 회전 및 이동을 통해 재배치한다. 구현된 인터페이스를 통해, 우리는 제안된 인터페이스가 공간 배치 응용 분야에서 유용성이 있음을 확인하였다.

  • PDF

A force-Guided Control with Adaptive Accommodation Bor Complex Assembly

  • Sungchul Kang;Kim, Munsang;Lee, Chong W.;Lee, Kyo-Il
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1998년도 제13차 학술회의논문집
    • /
    • pp.14-19
    • /
    • 1998
  • In this paper, a target approachable force-guided control with adaptive accommodation for the complex assembly is presented. The complex assembly (CA) is defined as a task which deals with complex shaped parts including concavity or whose environment is so complex that unexpected contacts occur frequently during insertion. CA tasks are encountered frequently in the field of the manufacturing automation and various robot applications. To make CA successful, both the bounded wrench condition and the target approachability condition should be satisfied simultaneously during insertion. By applying the convex optimization technique, an optimum target approaching twist can be determined at each instantaneous contact state as a global minimum solution. Incorporated with an admissible perturbation method, a new CA algorithm using only the sensed resultant wrench and the target twist is developed without motion planning nor contact analysis which requires the geometry of the part and the environment. Finally, a VME-bus based real-time control system is built to experiment various CA task. T-insertion task as a planar CA and double-peg assembly task as a spacial assembly were successfully executed by implementing the new force-guided control with adaptive accommodation.

  • PDF

웹기반 농업정보시스템 성공요인에 관한 연구 (Success Factors for Web-based Agricultural Information Systems)

  • 유철우;박수민;최영찬;심근섭
    • 농촌계획
    • /
    • 제15권4호
    • /
    • pp.59-74
    • /
    • 2009
  • This study reviews and modifies general IS success models to find success factors of WIS(Web-based Information Systems) and to confirm the relationship between WIS success and user's satisfaction of web use. A WISSM(Web-based Information Success Model extended to include EQ(E-Quality) is developed to anticipate user's intention to use Web-based Agricultural Information System and fit into the survey data from 252 WIS users of RDA(Rural Development Administration). PLS is applied to estimate a structural model based on EQ-WISSM to test hypotheses including 1) users reach a high level of intention to use Web-based Information Systems when they feel a high level of interactivity among an 'E-Quality', 'Decision Making Support Satisfaction' and 'Task Support Satisfaction', and E-Quality boosts intention to use Web-based Information Systems. The results show high path coefficients and $R^2$ values and find followings; First, the EQ-WISSM explains the user's intention to use WAIS quite well. Second, E-Quality can be used well in web-based IS environment to predict IS Success. Finally, this research finds the importance of 'Task Support Satisfaction' as a mediator between 'Decision Making Support Satisfaction', 'E-Quality' and 'Intention to Use'.

통계적 모형의 업무부하 균일화를 통한 비즈니스 프로세스의 효율화 (Workload Balancing on Agents for Business Process Efficiency based on Stochastic Model)

  • 하병현;설현주;배준수;박용태;강석호
    • 산업공학
    • /
    • 제16권spc호
    • /
    • pp.76-81
    • /
    • 2003
  • BPMS (Business Process Management Systems) is aninformation system that systematically supports designing, administrating, and improving the business processes. It can execute the business processes by assigning tasks to human or computer agents according to the predefined definitions of the processes. In this research we developed a task assignment algorithm that can maximize overall process efficiency under the limitation of agents' capacity. Since BPMS manipulates the formal and predictable business processes, we can analyze the processes using queuing theory to achieve overall process efficiency. We first transform the business processes into queuing network model in which the agents are considered as servers. After that, workloads of agents are calculated as server utilization and we can determine the task assignment policy by balancing the workloads. This will make the workloads of all agents be minimized, and the overall process efficiency is achieved in this way. Another application of the results can be capacity planning of agents in advance and business process optimization in reengineering context. We performed the simulation analysis to validate the results and also show the effectiveness of the algorithm by comparing with well known dispatching policies.

A GA-based Floorplanning method for Topological Constraint

  • Yoshikawa, Masaya;Terai, Hidekazu
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2005년도 ICCAS
    • /
    • pp.1098-1100
    • /
    • 2005
  • The floorplanning problem is an essential design step in VLSI layout design and it is how to place rectangular modules as density as possible. And then, as the DSM advances, the VLSI chip becomes more congested even though more metal layers are used for routing. Usually, a VLSI chip includes several buses. As design increases in complexity, bus routing becomes a heavy task. To ease bus routing and avoid unnecessary iterations in physical design, we need to consider bus planning in early floorplanning stage. In this paper, we propose a floorplanning method for topological constraint consisting of bus constraint and memory constraint. The proposed algorithms based on Genetic Algorithm(GA) is adopted a sequence pair. For selection control, new objective functions are introduced for topological constraint. Studies on floor planning and cell placement have been reported as being applications of GA to the LSI layout problem. However, no studies have ever seen the effect of applying GA in consideration of topological constraint. Experimental results show improvement of bus and memory constraint.

  • PDF

절삭가공 시 출구 버어의 최소화를 위한 최적 가공계획 알고리즘의 개발 (Development of Optimal Process Planning for Exit Burr Minimization in Milling Operation)

  • 김영진;김지환;정희철
    • 한국공작기계학회논문집
    • /
    • 제16권1호
    • /
    • pp.33-39
    • /
    • 2007
  • One of the most important processes is the face milling in processing task. It makes the smooth surface of processed goods. In processing stage, the formation of burr is inevitable. The formed burr decreases a detailed drawing and effects the safety of workers. So, it causes a deburring process for removing and a bottle-neck condition. Therefore, the study which can minimize the generation of burr is needed. In this paper, complex feature, such as line, arc, circle, spline is studied more reality than any other papers. And also, the algorithm which can predict the path of generated burr is established. Moreover, the finality goal is that the system which can produce tool-path minimized has to be developed.