Vmodel Help
Model building blocks
Number-Comparers
These compare how big or small quantities (things that can be measured)
are. Use them between number describers. Example: You might want to compare
the growth rate of two plants.
Greater-Than
When one quantity (something that can be measured) is greater mathematically than another, use this arrow. This is a one way relationship. Example: The height of the Sears Tower is greater than the height of your school.
Less-Than
When one quantity (something that can be measured) is smaller than another, use this arrow. This is a one way relationship. Example: The amount of games won by the Bulls this year is less than the amount they won when Jordan was playing.
Equals
Use this arrow when two quantities (things that can be measured) are equal or the same. This is a two way relationship. For example, the amount of rain today equals the amount of rain yesterday.
These relationships are between number describers, or between processes and number describers. If a box has a blue arrow pointing out of it, then a causal relationship can come out of it. When it has a blue arrow pointing into it, then a causal relationship can come into it. If it has a two way blue arrow, it can have a causal arrow coming either way from it.