Heuristics: 4. Consistency and standards



  1. The system is standard. It is similar to all other cinema kiosks.
  2. It is similar to other systems, which the user has probably already used.
  3. The system is nearly the same as the self checkout machines in the big supermarkets, which more that 80% of the people have used.
  4. The system is similar to a cash machine, which more than 95% of the people have used.
  5. The system is consistent. The element positions, colours, texts, controls, etc. do not randomly change as the screen changes.
  6. Once, the user starts using the system, the elements are at the place, where he would expect them on the next screen.