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rx-R
CONTROL C H A R T - - - - - - - - - - - - - - - - - - - - - -
(1) There are two methods of data input: one is to input data from the keyboard in
response to a request for input, and the other is to input data from a cassette tape on
which appropriate data has been previously stored by this program.
When the program is started, it asks which input method is to be used. Press the K key
for input from the keyboard. Press the T key for input from cassette tape.
1)
When input from the keyboard is selected
- Key in the group size n (number of data items in a group). The range of n is from
2
to 6.
- Key in the number of groups
k.
The range of
k
is from 2 to 40.
- Each time a group number is displayed, input the measured data associated with
that group.
2) When input from cassette tape is selected
Connect the cassette tape recorder. Pressing the CR key (
gJ
key) starts the tape.
The program then starts searching fro the appropriate data. When it finds the data,
it displays the file name "x-R DATA" and starts reading the data. First, the group
size and the number of groups are read and displayed. Then the measured values
are read.
(2) After all the data is input, the program asks whether there are any measured values
to be corrected. If there are, press the Y key.
If not, press the N key
When you press the Y key, the program prompts for the following input:
- Group number:
The group containing the data to be corrected.
- Measured data number
The data number in the specified group to be corrected.
- Input the correct value when the appropriate data is displayed.
The program then asks again whether there is any data to be corrected. If so, press
the Y key. If not, press the N key.
C•mt:mEl;{41
1
ii ■
(1) Printout ofx-R charts
Control charts (graphs) are plotted with the horizontal ancl vertical axes automatically
set up according td the number of groups and the values of UCL and LCL. The groups
within the control limits are represented by an asterisk(*). and the groups outside the
control limits are represented by a Z symbol.
(2) Printout of table
The table contains the input data, the mean value
x
and the range R for each group.
(3) Saving input data (measured values) on cassette tape
The program asks whether or not the input data is to be saved on a cassette tape. If
you wish to save the data on a cassette tape, press the Y key. If not, press the N key.
When you press the Y key, the program records the group size, the number of groups,
and input data under the file name
"x-R
DATA." (To start this save operation, set the
cassette tape recorder, press the REC button, and press the
gJ
key.)
After the input data is saved, program execution is terminated.
When you press the N key, the program is immediately terminated (without perform-
ing the save operation).
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