• Title/Summary/Keyword: scheduled software delivery time

Search Result 4, Processing Time 0.019 seconds

Optimal Release Policies of Software System with Scheduled Delivery Time (예정된 인도시기를 가진 Software시스템의 최적방출정책)

  • 정영배;신현재
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.9 no.13
    • /
    • pp.29-32
    • /
    • 1986
  • A decision procedure to determine when computer software should be released after testing is described. This paper extends optimum release policies minimizing the total expected software cost with a scheduled software delivery time under reliability requirement constraint. Such cost considerations enable us to make a release decision as to when transfer a software system from testing phase to operational phase. The underlying model is software reliability growth model described by a nonhomogeneous poisson process. It is assumed that the penalty cost function due to delay for a scheduled software delivery time is linearly proportional to time. Numerical examples are shown to illustrate the results.

  • PDF

Optimization of Software Cost Model with Warranty and Delivery Delay Costs

  • Lee, Chong-Hyung;Jang, Kyu-Beom;Park, Dong-Ho
    • Communications for Statistical Applications and Methods
    • /
    • v.12 no.3
    • /
    • pp.697-704
    • /
    • 2005
  • Computer software has gradually become an indispensable elements in many aspects of our daily lives and an important factor in numerous systems. In recent years, it is not unusual that the software cost is more than the hardware cost in many situations. In addition to the costs of developing software, the repair cost resulting from the software failures are even more significant. In this paper, a cost model with warranty cost, time to remove each fault detected in the software system, and delivery delay cost is developed. We use a software reliability model based on non-homogeneous Poisson process (NHPP). We discuss the optimal release policies to minimize the expected total software cost. Numerical examples are provided to illustrate the results.

Simulation of Efficient FlowControl for Photolithography Process Manufacturing of Semiconductor

  • Han, Young-Shin;Lee, Chilgee
    • Proceedings of the Korea Society for Simulation Conference
    • /
    • 2001.10a
    • /
    • pp.269-273
    • /
    • 2001
  • Semiconductor wafer fabrication is a business of high capital investment and fast changing nature. To be competitive, the production in a fab needs to be effectively planned and scheduled starting from the ramping up phase, so that the business goals such as on-time delivery, high output volume and effective use of capital intensive equipment can be achieved. In this paper, we propose Stand Alone layout and In-Line layout are analyzed and compared while varying number of device variable changes. The comparison is performed through simulation using ProSys; a window 98 based discrete system simulation software, as a tool for comparing performance of two proposed layouts. The comparison demonstrates that when the number of device variable change is small, In-Line layout is more efficient in terms of production quantity. However, as the number of device variable change is more than 14 titles, Stand Alone layout prevails over In-Line layout.

  • PDF

Conveyor Capability Simulation for Semiconductor Diffusion Area (반도체 확산공정에서의 컨베이어 적정속도와 길이를 구하는 시뮬레이션)

  • 박일석;이칠기
    • Journal of the Korea Society for Simulation
    • /
    • v.11 no.3
    • /
    • pp.59-65
    • /
    • 2002
  • Semiconductor wafer fabrication is a business of high capital investment and fast changing nature. To be competitive, the production in a fab needs to be effectively planned and scheduled starting from the ramping up phase, so that the business goals such as on-time delivery, high output volume and effective use of capital intensive equipment can be achieved. Project executed that use conveyor in bay semiconductor A line. But conveyor capability is lacking and rundown happened in equipment. Do design without normal simulation and conveyor system failed. The comparison is peformed through simulation using .AutoMod a window 98 based discrete system simulation software, as a tool for comparing performance of proposed layouts. In this research estimate optimum conveyor capability, there is the purpose.

  • PDF