| ProblemFormulation ||
In order to formulate a simulation model we specify the following components: |
Components 1(Background – problem description) and 2 (Objectives of the study) are given in the Problem Description section (see paragraph describing the goal of the simulation study to identify study objectives).
The Expected benefits (component 3) are a virtual environment for evaluating patient waiting times, total time patients spend in the clinic, and the number of patients waiting for treatment. This environment can be used to experiment with changes to the clinic, including a comparison of effects on the waiting times, queue length, etc for the walk-up vs the scheduled patients.
The CM content is specified using the following components:
- Background – problem description
- Objectives of the study
- Expected benefits
- The CM: inputs, outputs, content, assumptions, simplifications’
- Experiments to run
The components of the Extended Health Clinic model are:
- Component List
- Process flow diagram
- Logic flow diagram
- Activity cycle diagram
Process Flow Diagram
- Walk-up patients with their (inter)arrival times
- Scheduled patients with their appointment times
- Triage nurses with their triage times
- Test nurses with their testing times
- Doctors with their treatment times
- Waiting room with its capacity
Activity Cycle Diagram
Once the content has been established (note this is usually an iterative process) we can identify the inputs and outputs: appointment times, interarrival times, triage times, test times, treatment times, waiting times for triage, testing, and treatment (i.e., Patient arrives to Nurse triages Patient, Nurse triages Patient to Nurse performs test on Patient, Nurse performs test on Patient to Doctor sees Patient, Nurse triages Patient to Doctor sees Patient, Patient arrives to Doctor sees Patient), total clinic time (Patient arrives to Outside), number in waiting room.
Assumptions are used to define stochasticity (e.g., Exponential interarrivals, Triangular treatment times) and the simplifications keep the system simple (e.g., single doctors and nurses on all day for triage, testing, and treatment, no registration, no prioritisation).
| Patient Logic Flow Diagram || Doctor Logic Flow Diagrams |
| Nurse Logic Flow Diagrams |