Control : Advantages and Disadvantages

Using a computer to control a process has a number of important advantages over controlling the same process manually.

1. Computer systems respond more quickly than humans. A computer system can take readings from sensors and turn devices on and off many thousands of times a second.
2. Once the initial purchase cost has been paid, control systems are usually reasonably cheap to run. Most computer control systems have lower operating costs than similar systems which are manned by humans.
3. Computer control systems are very reliable. Unlike a human a control system will not lose concentration. Computer systems can continue to operate reliably twenty four hours a day.

There are however some disadvantages of using a computerised system :

1. The initial cost of designing a new system and purchasing hardware and software may be high.
2. There may be job losses as computers replace humans.
3. The control system will only operate correctly if the software program which runs the system has been designed well. Flaws in the design may produce unexpected problems during operation.

GCSE ICT Companion 04 - (C) P Meakin 2004