When listing a scenario try to remember this is not a play, there is not predetermined outcome and we can never hope for things to actually play out the way we want them to in the long run. We can, or should be able to, rely on properly setting up and instigating any given scenario according to the plans laid out here, but in the end, it will play out as it will. The more steps a scenarios has, the greater the odds of it breaking down, upsetting people, and generally not being good. Scenarios based roughly on original events are generally a good place to work from.
Be specific and and break down what you want to achieve to its basic parts and list them. For example…-Deploy an engineer unit to clear a path through a minefield. This requires mines already laid out in a specific area and quite possibly some specialized equipment to be issued out or a method of marking the cleared path would need to be provided also some training may be required and cover may need to be provided.-Order a unit to probe a section of the enemies line and report back. Orders would have to be specific on where to probe (Between here and here), what to look for (is there a MG? where is it? how many men do they have? how close can you get before they spot you? is there a good access of advance? etc...) and how to relay that information back. They may also need reminded this is not an assault and they should expend great effort to collect good information at a low cost.
This should give you a general idea of what we need. It all sounds boring and straight forward, but details are easy to forget and it's easy to take basic things for granted.