I'm putting Samsung's Mission statement here because they just launched the Note 8 after recalling the Note 7 last year, When you look at their mission statement and how they've proven themselves with their products over the years, you can see how their reputation has been able to survive

they not only make Smartphones but also televisions, computers, and appliances for the kitchen

Your mission statement should be specific and narrow enough that it couldn't apply to just any company… but it should be flexible enough to allow for growth and change.

Allow your mission statement to guide you… and you will never find yourself making questionable decisions. The decision will be made for you.