@iklawapps the key distinction between different types of written exercises is how you cater your writing to your audience. Although it seems like an obvious one, you'd be surprised how many times people have bulked up an "email to a client" thinking more words meant more marks, when in reality it meant failing to understand your audience. So, first thing to think about when you have a written exercise, whether that be an internal memo, email to a partner, letter to a client, think about the audience. If it is a memo, you can afford to keep it brief and bulleted, if it is for a partner (dependent on the topic) you can break it down to make it easily digestible for them to read without compromising on commercial points, as for the client you can break it down even further to get straight to the point without going into to much detail on rationale. Once you have your audience in mine, you will understand the structure and how much time/detail needs to go into that portion of the task. Hope this helps