1) You want to refinance or fundraise. Investors and lenders want to know about your current challenges and have the most up-to-date look at the costs and opportunities you’re forecasting.
2) You launch a new product or service. A new revenue stream will impact how you manage your resources – and can impact profitability. Let partners and investors in on your vision to get their buy-in and help with execution.
4) Your competitors have changed. Half the battle of running a successful business is staying aware of what the others in your industry are doing. If your major competitor pivots or there is an up and coming venture that enters the field, include that in your plan
5) You change suppliers or technologies. Changing your supply chain could help you cut costs or even position your company as more environmentally friendly. Furthermore, a shift to a new tech platform could give your company an important competitive advantage that investors will want to know about.
6) Your customer changes. If your target customer has shifted, you might need to meet a different set of wants and need. If so, you’ll need to explain in your business plan how you’ll find your new core market and retain it."