Details of the ISHIKAWA Environment

Input and Output Data Sets

ISHIKAWA Procedure The following is a complete list of the variables in output SAS data sets created by the ISHIKAWA environment:

   Variable    Type    Len    Description
   ----------------------------------------------------

   _LEVEL_     Num       8    Level of detail
   _TEXT1_     Char     40    First  line of label
   _TEXT2_     Char     40    Second line of label
   _TEXT3_     Char     40    Third  line of label
   _TEXT4_     Char     40    Fourth line of label
   _TEXT5_     Char     40    Fifth  line of label
   _NOTE1_     Char     40    First  line of note
   _NOTE2_     Char     40    Second line of note
   _NOTE3_     Char     40    Third  line of note
   _NOTE4_     Char     40    Fourth line of note
   _RELPOS_    Num       8    Relative arrow position
   _SIDE_      Char      1    Side arrow attaches to parent
   _ANGLE_     Num       8    Angle (non-horizontal arrows)
   _LWIDTH_    Num       8    Line width
   _LSTYLE_    Num       8    Line style
   _LCOLOR_    Char      8    Line color
   _TCOLOR_    Char      8    Text color
   _ICOLOR_    Char      8    Box infill color
   _SCOLOR_    Char      8    Shadow color
   _STYPE_     Char      1    Shadow type
   _SWIDTH_    Num       8    Shadow width
   _RELLNG_    Num       8    Relative length of an arrow
   _HLEVEL_    Num       8    Arrow head threshold
   _HSTYLE_    Num       8    Arrow head style
   _HLNGTH_    Num       8    Arrow head length
   _HWIDTH_    Num       8    Arrow head width
   _HTEXT_     Num       8    Font height
   _FTEXT_     Char      8    Font

Only the variables _LEVEL_ and _TEXT1_ are required in the input data set for the ISHIKAWA procedure. Each observation in the input data set corresponds to a particular arrow in the diagram. The order of the observations is critical because it defines the relationships of the arrows.

The trunk is always the first observation.
The remaining observations are ordered so that leaves are nested within stems, stems are nested within branches, and branches are nested within the trunk.
The variable _LEVEL_ is numeric and indicates the level within the diagram. The trunk has a level of 0, branches have a level of 1, stems have a level of 2, and so on.
The first line of text in a label is stored as _TEXT1_, the second as _TEXT2_, and so on.

Example

The following is a partial listing of the SAS data set used to create the Ishikawa diagram shown in Figure 18.4:

The SAS System

Obs _level_ _text1_ _text2_ _text3_

1 0 Quality Air Travel Service

2 1 Pre-Flight Service

3 2 Competitive fares

4 2 Convenient departure times

5 2 Quick ticketing

6 2 Frequent flier courtesies

7 1 In-Flight Service

8 2 Prompt departures

9 2 Comfortable seating

Figure 18.71: Input SAS Data Set

Note the structure of this data set:

The trunk (always the first observation) has a _LEVEL_ value of zero.
All subsequent observations for which _LEVEL_ is equal to one are branches that emerge from the trunk.
Observations 4 and 5 are both leaves that emerge from the preceding stem (observation 3).
Likewise, leaves 7 and 8 emerge from the preceding stem (observation 6).

You can use this data set as a way of extracting text and notepad information from the diagram.

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