Why should program planning and management occur on a regular basis? Why is it necessary to continually “revise and reassess”?

Dear writer, I need to answer this discussion question with 500 words APA 7th edition
with TWO references one ONLINE and one from the BOOK, we are using.
Book:

Title: Criminal Justice Policy
and Planning: Planned Change (5th ed.)
Author: Welsh, W., & Harris, P.
Year Published: 2016
Publisher: Routledge/Anderson Publishing
ISBN: 9780323298858

Welsh & Harris – Chapter 7

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