establishing controls

In an effort to establish controls, a new manager decides to spend one afternoon each week double-checking every chart his nursing care staff has completed for the previous week. 

(a) In what ways is this attempt at control ineffective?

(b) What would be examples of an internal and an external control the manager could set up to improve any problems with charting?

Requirement:  One original post (200 word minimum) and two additional posts.

APA Format, please include references and in citations.