Why might Yahoo's business plan switch over time?
Answers:
Business plans are intended to amendment. There are various impact to a business - customers, technology, law, etc. External influences affect businesses internally. Most business plans are base on 3- or 5-year plan and is designed to be reviewed AT LEAST once a year. Some are reviewed quarterly. If company exceeds their margins or their numbers aren't what is expected, consequently a re-evaluation of expectations is required - whether accurate or unpromising. A business plan is a template and not intended to be static. It is an evolving document over time. Hope this help - it's nice to put that MBA to use finally...
Dragonlady is correct. Business plans can transformation for both internal AND external reason. Sometimes a unknown CEO near different regulation styles will transformation the business plan. Acquisitions are another factor. The cutback is a big factor.