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This guide outlines the steps to create and analyze a process model in the DSS Lab using the Input Analyzer. Start by importing data into a text file and configuring the Input Analyzer to model a system with three workstations—A, B, and C—each processing parts sequentially every ten minutes. Define processing times using triangular distributions, set transfer times, collect cycle times, and animate the model for a total run time of 10,000 minutes. Follow the steps outlined to ensure proper sequencing and assignment of parts through the system.
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Input Analyzer • Create text file of data • Save text file as: • Textfile.dst • Open input analyzer • Click “new” icon • Click “use existing data file” icon • Browse for Textfile.dst • On “Fit” pull down menu, select “fit all” or a specific distribution “new” icon “use existing data file” icon
Problem 7.4 • A part arrives every ten minutes to a system having three workstations (A,B, and C), where each workstation has a single machine; the first part arrives at time 0. There are four part types, each with equal probability of arriving. The process plans for the four part types are given on the next slide. The entries for the process times are the parameters for a triangular distribution. Assume that the transfer time between arrival and the first station, between all stations, and between the last station and the system exit is three minutes. Use the Sequence Feature to direct the parts through the system and to assign the processing times at each station. Use the Sets feature to collect cycle times (total times in system ) or each of the part types separately. Animate the model and run for 10,000 minutes.
Problem 7.4 Arrival Station 1 Station A Station C 1 2 1 2 2 2 1 4 3 3 Station B Exit Station Part 1 Part 2 Part 3 Part 4 3 3
Problem 7-4 Workstations B & C Define workstations B & C as you did for workstation A
Problem 7-4: Create Sets Add the following sets, using “Set” spreadsheet under “Basic Process” Panel. To add members to the sets, click on tab under “Members” for the set of interest. Define the sets as shown. 3 sets to define Cycle Time Set members Entity Type Set members Picture Set members
Problem 7-4: Define Advanced Set Define advanced set using “Advanced Set” under “Advanced Process” Panel. Advanced Set with members
Problem 7-4: Define Sequences To define sequences, double click on “Sequences” under “Advanced Transfer Panel”. If the “Advanced Transfer Panel” is not listed under the panels available on left of screen, go to file -> template panel -> attach. Make sure the names used are the same names you defined in the advanced set.
Problem 7-4: Part Sequence 1 Steps for part Sequence 1 Assignment Made at step 1 Assignment Made at step 2
Problem 7-4: Part 2 Sequence Part 2 Sequence Steps Assignment made at Step 1 Assignment made at Step 2 Assignment made at Step 3
Problem 7-4: Part 3 and Part 4 Sequences • Complete similarly to Part 1 and Part 2 Sequences. Refer to chart on p.314 for process time at each step.
Problem 7-4: Animate Exit Station Arrival Station Leaving Workstation A Entering Workstation A Leaving Workstation B Entering Workstation B Entering Workstation C Leaving Workstation C
Problem 7-4: Animate Stations and Routes Station Icon with Menu settings Route Icon with Menu settings
Problem 7-4: Animate Resources Icon for resources animation. Make sure you Check “seize area”.
Homework • Problem 7-8 in textbook • Work in groups of 2 • Submit Electronically to • dss_hw5 filename.doe • Don’t forget to animate the model as asked in problem statement. • Write down all stats asked for and display on flowchart page of Arena model/
Midterm • Total Possible = 100 • Max = 99 • Min = 30.5 • Average = 63.14 • Standard Deviation = 15.88 • If you need to pick up your test see Chun-Ling.
Midterm • Theory • Graded by Chun-Ling • Total Possible = 65 points • Max = 65 • Min = 26.5 • Average =46.97 • Arena • Graded by Natalie • Total Possible = 35 • Max = 40 • Min = 0 • Average = 16.17
