Disadvantages And Disadvantages Of Simulation Of A System

A simulation of a system is the operation of a model, which is a representation of that system, in real experiment, simulation doing more costly and time consuming in sense of hardware and other resources. So by software, we try to remove these hardware and cost burden.

Types of Simulation:
3. Pure continuous simulation: In this, value is defined all time.
Example: Airplane flights: state variable like position, velocity change continuous.
4. Pure Discrete simulation: In this, value is defined at discrete point in time, not all the time. Its sub variants: a. Event oriented b. Activity oriented c. Process oriented Example: Bank Model: change occurs when customer arrives or departs. (3) Combined Discrete/Continuous Simulation. Example: As military application like Fighter plane simulation: continuous like its state variable velocity and position and discrete its state variable velocity and position change and discrete like firing weapons. So many systems are partly discrete and partly continuous.

Fig.3.1: Continuous and Discrete Simulation

Advantage of simulation:
4. Real-world experiment sometimes impossible and costly, so simulation is better.
5. Mathematical model sometime painful and inaccurate.
Disadvantage of simulation:
c. Simulation cannot totally replace real-world experiment.
d. Simulation sometimes misses the whole picture due to wrong assumptions.
e. Like simulating how the global Internet behaves is an immensely challenging undertaking