Simulation and modeling - Old Questions
7. Define activity, event and state variables. List out the activities and events for the following systems;
a. Super
market
b. Inventory
control
c. Hospital
Answer
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Activity: The time period of specified length is called activity.
Event: An instantaneous occurrence that might change the state of the system is called event.
State variables: A collection of variables necessary to describe a system at any time is called state variables.
Now,
a. Supermarkets
Activities: sell product, fill displays, organize the supermarket carts
Events: Arrival and departure of customers, reception of products, lack of products
b. Inventory control
Activities: Withdrawing
Events: Demand
c. Hospital
Activities: vaccinate, feed the patient, administering medicines, heal the wounds
Events: lack of medicines, lack of staff, lack of beds, arrival and departure of patients.