sml_ch07 - IME Educating Global Information Technology...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
IME Educating Global Information Technology Frontiers Simulation 한국외국어대학교 Ch 7. Intermediate Modeling and Steady-State Statistical Analysis
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
What We’ll Do ... Model 7-1: A small manufacturing system Entity-dependent Sequences Data requirements and availability Verification (debugging) Statistical analysis of steady-state simulations HUFS 2 Simulation Warmup and run length Truncated replications Batching Other methods and goals
Image of page 2
Model 7-1: A Small Manufacturing System Part arrivals, four cells, part departures HUFS 3 Simulation Cells 1, 2, and 4: single machine each Cell 3: two machines — newer one 20% faster Need: way to model non-identical resource units Circular layout of cells Parts enter at left, exit at right, travel only clockwise, all transfer times = 2 min. (realistic?)
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A Small Manufacturing System (cont.) Three separate part types Interarrivals ~ Expo(13) minutes 26% type 1, 48% type 2, 26% type 3 Different part types follow different routes, have different (triangular) processing times: HUFS 4 Simulation Observe utilizations, time/number in queues, cycle times (times in system) by part type At Cell 3, parameters are for slow machine
Image of page 4
New Arena Concepts Non-identical machines at Cell 3 Different entity types follow different process plans Need process plan with automatic routing by entity type – different Sequence assigned to each entity (like an attribute), and entity follows its own sequence HUFS 5 Simulation Won’t use direct Connect or Routes … instead, tell entities departing from modules to follow their own Sequence Arena internally keeps track of where entity is, where it will go next
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The Modeling Approach Use Sequence for part transfer As part of Sequence definition, can define Attributes Do for processing times at all cells but Cell 1 Use an Expression for processing times at Cell 1 Use Variables for new-machine speedup at Cell 3, part transfer times HUFS 6 Simulation
Image of page 6
Sequence Data Module Advanced Transfer panel Double-click for new row for each process plan Open Steps column for subdialog Define ordered sequence of Stations to be visited in the Sequence … must have Station Names already defined Double-click to add a new Station to the bottom of the HUFS 7 Simulation Sequence list; right-click to insert/delete a row Name for each step Possible Assignments of Attribute, Variable, Pictures, etc. at each station in the Sequence … this is done before transferring the entity to this step in the sequence In this model, Attribute assignment used to attach Process Time Attribute to entity for the next Cell (except for Cell 1)
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Sequence Data Module (cont.) Assign Sequence Name to entities that follow it In Route modules, select Sequence as Destination Type (rather than Station) Departing entity looks in its own sequence to know where to go next Arena tracks Sequence-following entities via HUFS 8 Simulation
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern