How to write a film treatment

From the hyperlink below I have learnt that you need to be able to:

1. Know the length - treatments can be around 30-40 pages, there is no correct length for a treatment as they are for a certain audience.
2. Creating the log line - most screenwriters begin with one-to-two sentences description of their story. Ideally it should include a main character, the main antagonist, the nature of their conflict, genre elements and hints of the plot through, but you shouldn't reveal the end in it.
3. Some writers expand the story outline, letting each bullet point represent a story beat or a scene, so then the final product approximates a rough scene outline of a story. Other writers prefer a categorical approach, where they explore different aspects separately not usually in chronological order
4. understand that the form should suit the reason for which you are creating the treatment - make it as simple as possible, while making sure to convey the elements that make it stand out

From learning how to do a film treatment I will make sure that there is a short story that is created on it without giving the ending away and it should be set out a bit like a script. Also the overall treatment needs to summed down as simple as possible, to then be able to convey the elements that make it stand out and not make it too boring and it is important to have it in chronological order as I feel if this wasn't done then it would become incredibly confusing.

Reference: http://www.wikihow.com/Write-a-Script-Treatment