Split the big job

You plan a picnic. That is one big job. Where do you start?

Start by splitting the picnic into parts. Each part is small enough to do.

Now tap Forget a part in the lab. The bus job has no box, so it is left out.

Decomposition splits a big job into smaller, named parts.

Give every part a clear name. A part with no name is easy to forget. A forgotten part leaves its jobs undone.