Table 2 Optimal method of solving the test with the enumeration of decision levels at each step

1.

Start of communication with confirmed choice (2 states/1 bit)

2.

Selection mode—headrest, both, leg rest, up, down, reset, end (6 states/3 bits)

3.

Selection mode—both, leg rest, up, down, reset, end (5 states/3 bits)

4.

Selection mode—up, down, both, reset, end = (5 states/3 bits)

5.

Execution mode (2 states/1 bit)

6.

Selection mode—both, leg rest, up, down, reset, end (5 states/3 bits)

7.

Selection mode—headrest, both, leg rest, up, down, reset, end (6 states/3 bits)

8.

Selection mode—headrest, both, up, down, reset, end (5 states/3 bits)

9.

Selection mode—up, down, both, reset, end = (5 states/3 bits)

10.

execution mode (2 states/1 bit)

11.

Selection mode—headrest, both, leg rest, up, down, reset, end (5 states/3 bits)

12.

Selection mode—headrest, both, leg rest, up, down, reset, end (6 states/3 bits)

13.

Selection mode—both, leg rest, up, down, reset, end (5 states/3 bits)

14.

Selection mode—up, down, both, reset, end = (5 states/3 bits)

15.

Execution mode (2 states/1 bit)

16.

Selection mode—both, leg rest, up, down, reset, end (5 states/3 bits)

17.

Selection mode—headrest, both, leg rest, up, down, reset, end (6 states/3 bits)

18.

Selection mode—headrest, both, up, down, reset, end (5 states/3 bits)

19.

Selection mode—up, down, both, reset, end = (5 states/3 bits)

20.

Execution mode (2 states/1 bit)

21.

Return to stand-by mode (2 states/1 bit)