際際滷

際際滷Share a Scribd company logo
1
Existing Observation
 Computer Files
 Database
 Spreadsheets
 Raw Data
 Video Records
 Hard Copy Files
& Documents
 Interviews
 Video
 Observation of
running system
 Interviews
2
Preliminary Detailed
 To help design
model
 Interviews
 Observation
 Minimum
necessary
 To obtain input
parameters
 Adequate
amount for
statistical tests
3
Preliminary Detailed
 Data to Determine
 Layout of system
 Entities of
importance
 Flow of entities
 Problems
 Rough estimates of
times
 Data for
 Arrivals
 Services
 Queues
 Anomalies
4
 Focus on data related to problems &
objectives
 Enough data for statistical significance
 Continuous data
5
Depends on Simulation Objectives &
Level of Activity
 Days of week
 Busiest, Typical, Slowest
 All, Certain ones
 Time of day
 Busiest, Typical, Slowest
 Start-up, Wind-down
 Length of time
 Adequate numbers
6
 Minimum of 2 collectors for each
major entity
 One watches & times; One records
 Factors
 Level of Activity
 Proximity of areas to be observed
 Visibility
7
Collectors can have NO Effect on the
system!
 Should be located outside the
system
 Cannot utilize any resource
 Never interfere
 Best if not seen
8
 Collect information necessary to
reproduce system activity
 NOTE: That is not everything!!
 Example: Single Queue & Server System
 Arrival Time, Begin Service, End Service
 Allows calculation of all remaining values
of interest. How?
 Time Units
 Smallest necessary (seconds, minutes)
9
Customer
Number
Arriva l Time
Hr:Min:Sec
Begin Service End Service
1 0:0:0 0:0:0 0:5:26
2 0:3:30 0:5:26 0:10:45
3 0:12:0 0:12:0 0:15:50
4 0:13:24 0:15:50 0:19:55
Comments??
10
 A description of process that includes
 Method(s) for collection
 Timeline for data collection process &
completion
 List of data items to be collected
 Number of collectors
 Dates & times of actual data collected (if not
observed in real-time)
 Justification for each of the above
 Diagrams as necessary
11
 A description of completed collection
process that includes
 Restatement of Plan & any changes to
original plan
 Results of Statistical Analysis of data
 Graphs, Averages, Max, Min
 Summary of results
 Relation of results to clients objectives
 Recommendations
 Diagrams as necessary
12
 Select System
 Design & Write Data Collection Plan
 Observe & Collect
 Complete Data Analysis
 Write Data Collection Report
13
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Data Collection 2.pptx

  • 1. 1
  • 2. Existing Observation Computer Files Database Spreadsheets Raw Data Video Records Hard Copy Files & Documents Interviews Video Observation of running system Interviews 2
  • 3. Preliminary Detailed To help design model Interviews Observation Minimum necessary To obtain input parameters Adequate amount for statistical tests 3
  • 4. Preliminary Detailed Data to Determine Layout of system Entities of importance Flow of entities Problems Rough estimates of times Data for Arrivals Services Queues Anomalies 4
  • 5. Focus on data related to problems & objectives Enough data for statistical significance Continuous data 5
  • 6. Depends on Simulation Objectives & Level of Activity Days of week Busiest, Typical, Slowest All, Certain ones Time of day Busiest, Typical, Slowest Start-up, Wind-down Length of time Adequate numbers 6
  • 7. Minimum of 2 collectors for each major entity One watches & times; One records Factors Level of Activity Proximity of areas to be observed Visibility 7
  • 8. Collectors can have NO Effect on the system! Should be located outside the system Cannot utilize any resource Never interfere Best if not seen 8
  • 9. Collect information necessary to reproduce system activity NOTE: That is not everything!! Example: Single Queue & Server System Arrival Time, Begin Service, End Service Allows calculation of all remaining values of interest. How? Time Units Smallest necessary (seconds, minutes) 9
  • 10. Customer Number Arriva l Time Hr:Min:Sec Begin Service End Service 1 0:0:0 0:0:0 0:5:26 2 0:3:30 0:5:26 0:10:45 3 0:12:0 0:12:0 0:15:50 4 0:13:24 0:15:50 0:19:55 Comments?? 10
  • 11. A description of process that includes Method(s) for collection Timeline for data collection process & completion List of data items to be collected Number of collectors Dates & times of actual data collected (if not observed in real-time) Justification for each of the above Diagrams as necessary 11
  • 12. A description of completed collection process that includes Restatement of Plan & any changes to original plan Results of Statistical Analysis of data Graphs, Averages, Max, Min Summary of results Relation of results to clients objectives Recommendations Diagrams as necessary 12
  • 13. Select System Design & Write Data Collection Plan Observe & Collect Complete Data Analysis Write Data Collection Report 13