7 or 15 steps?

If you struggle with learning a piece of organ music, check if you are not missing any steps. Here is what I mean.

Some people learn a piece in 7 steps:
1. Right hand
2. Left hand
3. Pedals
4. Both hands together
5. Right hand and pedals
6. Left hand and pedals
7. Everything together

This works in cases when the piece has 3 parts or is largely homofonic in texture (melody plus accompaniment). But when there are 4 parts and the piece is polyphonic in nature (with 4 independent parts), it would be better to take 15 steps:

1. 1
2. 2
3. 3
4. 4
5. 1 and 2
6. 1 and 3
7. 1 and 4
8. 2 and 3
9. 2 and 4
10. 3 and 4
11. 1, 2, and 3
12. 1, 2, and 4
13. 1, 3, and 4
14. 2, 3, and 4
15. 1, 2, 3, and 4

I know how tempting it is to skip these 8 steps in four-part music. But if you think about it, often it's a leap from 1 part to 3 parts without working on many of two-part combinations.

Do you go from A to D without touching B and C? If you do, you're a genius. But if you're not (or not yet), it's better to do it step-by-step.