The Strategy Choice Cascade (SCC) is a fairly flexible tool so there are a few ways to get value from it.
If you’re planning a mobile app, you should align it with your current organisational strategy. Using this sheet, you can quickly capture that organisational strategy on one page, and then make your mobile decisions with that at hand.
If you look at your mobile app through this lens it's pretty useful too. You can then clearly see how the mobile strategy supports the organisational strategy. For example, a mobile app might only target a subset of customers, or it might focus on one core service offering.
You might be getting the idea, but you can use this for pretty much any strategy - from divisional to departmental.
If you want to learn more, see Roger Martins best selling book - Playing to Win: How Strategy Really Works. It is also taught on the IDEO U Designing Strategy course.