Merge pull request statecharts#37 from netaisllc/patch-6

Update benefit-non-developers-understanding.md

Author: mogsie

benefit-non-developers-understanding.md

@@ -1,8 +1,8 @@
 # Non-developers can understand statecharts
 
-Statecharts, being inherently a visual tool, is a great communication tool between the code and various stakeholders that have a need to understand the behaviour of the code.  The techniques described in [Easier to understand](benefit-easy-to-understand.html) apply just as much to non-developers too.
+Statecharts, being inherently a visual tool, are a great communication tool between the code and various stakeholders that need to understand the behaviour of the code.  The techniques described in [Easier to understand](benefit-easy-to-understand.html) apply just as much to non-developers too.
 
 * Designers can use the statechart to determine which states need which type of UI 
-* QA personell can [use the statecharts as an exploratory tool](benefit-qa-exploration-tool.html)
-* Project owners can look at statecharts to understand its behaviour and verify that requirements are met
+* QA staff can [use the statecharts as an exploratory tool](benefit-qa-exploration-tool.html)
+* Project owners can look at statecharts to understand system behaviour and verify that requirements are met