Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved 1

Learning Simio Lab Series

Lab Module 9

User-defined Statistics

2

Objectives and Outline

• Lab Objectives– Continue learning basic Simio modeling– Learn how to use Simio user-defined statistics (Output, Tally, State)– Learn how to use add-on processes and resource lists to implement a customized secondary-resource

requirement

• Lab Outline– Video 1 – Emergency Department Model– Video 2 – Adding User-defined Statistics– Video 3 - Adding User-defined Statistics (cont.)– Video 4 – Assignments

Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved

3Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved

Video 1 – Emergency Department Model

• Based on Model 9.1• Focus on user-defined statistics

– Tally Statistics– State Statistics– Output Statistics

• Secondary Resources

4Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved

Patient Flow and Doctor/Nurse Requirements

Room Exam/Treatment Resource(s) Required

Exam Room Doctor or Nurse, Doctor preferred

Treatment Room Doctor and Nurse

Trauma Room Doctor and (Nurse or Doctor, nurse preferred)

Registration Exam

Treatment

Trauma

Routine

Moderate

Severe

Trauma

Interested in:• Resource requirements (cost)

• Rooms (Exam, Treatment, Trauma)• Doctors• Nurses

• Patient waiting time (time before seeing the doctor/nurse)

5Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved

Video 2 – Adding User-defined Statistics

Registration Exam

Treatment

Trauma

Routine

Moderate

Severe

Trauma

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Video 3 – Adding User-defined Statistics (cont.)

Registration Exam

Treatment

Trauma

Routine

Moderate

Severe

Trauma

Cost = $2000 * Exam Capacity + $2500 * Treatment Capacity + $4000 * Trauma Capacity+ $4000 * Nurse Capacity+ $12000 * Doctor Capacity+ $250 * Total Patient Waiting Hours

7Copyright © 2013 - Jeffrey S. Smith and Simio LLC | All Rights Reserved

Video 4 – Assignments

• Add a new user-defined statistic to track the number of non-urgent patients in the system.

• Add a new user-defined statistic to measure patient throughput. Use this statistic to determine whether or not the system is stable (i.e., the system has sufficient resources to handle the patient load).

• Add a new user-defined statistic for patient satisfaction. Define patient satisfaction as the proportion of Routine patients who wait less than or equal to 0.5 hours.

• Create an experiment and try to find the best resource capacities (in terms of our cost function) subject to the constraint that patient satisfaction is at least 80% (and demonstrate that the system is stable using the throughput statistic).