Introducing ICT systems
Introducing ICT systems

This free course is available to start right now. Review the full course description and key learning outcomes and create an account and enrol if you want a free statement of participation.

Free course

Introducing ICT systems

16.2 Processes at the checkout

From the point of view of the customer and the checkout operator, a supermarket's ICT system is like the stand-alone computer you saw in Figure 10 in Section 9. The system map in Figure 12 represents this view. The boundary of the system has been drawn tightly, so that we can focus on the important processes being carried out at the checkout. I've called the system the 'checkout system' and there are three components: the customer, the checkout operator and the checkout terminal.

Figure 12
Figure 12 System map of a checkout system

I've also adapted the diagram of the stand-alone computer you saw in Figure 10 to show the checkout system as a block diagram (Figure 13). The computer is now the checkout terminal. However, there is an important difference between the two diagrams in that this computer has two users, the checkout operator (User 1) and the customer (User 2). The reason for this should become clearer as we discuss the processes involved at the checkout.

Figure 13
Figure 13 The checkout system

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to university level study, find out more about the types of qualifications we offer, including our entry level Access courses and Certificates.

Not ready for University study then browse over 900 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus