When it comes to WordPress, there are endless possibilities towards what you can develop for the end user. This can be tricky when it comes towards developing a theme for multiple specific needs. However, every problem comes with a solution.
To start off, you need to know what the theme will need to do for the user. It’s important to think like a blogger rather than a developer in this stage, because you may end up missing some important features for your client. For example, when developing my own blog, I know that I’d only need to align images, write content and occasionally add in some quotes to my posts. This made developing a theme easy for myself as it only required three simple check boxes I would need to check off.
However, if you’re unsure exactly what the requirements are of the WordPress theme which you are building. There is a site that will provide you with all the possibilities of developing a WordPress theme http://wptest.io/. What this does, it will give you a file which you upload to your blog. Which will test all of the available possibilities that can be done in wordpress, the benefit of this is that you won’t need to worry about your client coming back to you saying that something they’d like to do doesn’t work. However if they do, you already know that it is not possible to code without the use of a plugin.