One word synonym for "easy to follow"

If you are looking for something concise, I would like to suggest the word:

clear
adjective
1. easy to perceive, understand, or interpret.

straightforward

I like it because it implies that somebody following this could repeat it easily and implies direct motion through the steps. Essentially, you have created a path and they just need to go through it. Things like coherence and concise are more value judgement on what you have produced rather than a quality of the path of the final product. I think it also implies that the end user should approach the path with as few ambiguities as possible.

For the first criterion, perhaps accessible

easy to appreciate or understand

For the second effective

attractive or impressive, and producing a definite effect