Click to enlarge
You then need to schedule the different activities in a Gantt Chart. Depending on your team or lack of it, you can have several things going on at the same time to cut down on the time you take from conceptualisation to documentation and implementation
If you are doing the work yourself it may be wise to address one issue at a time unless you have prior knowledge and experience on the activity. This allows you to do research on each activity and get the information you need to tailor what you do to your business idea, your industry and related competitive sectors.