Do you mean a model in terms of format? If that's what you're asking, they all follow pretty much the same format. From that perspective, any of the scenarios would work.
Do you mean a model in terms of plotting? In those terms, we tried to keep things fairly variable, so that it wouldn't feel like you were playing the same adventure every month.
At the same time, every mission is going to have some common elements.
They almost always start with a call from a fixer or a Mr. Johnson, followed by a hiring scene.
From there, there's almost always some variety of legwork. (Part of which will be detailed in the back in the Legwork section.)
Then, there'll usually be 2-5 scenes along the way. The content and number of these will vary depending upon the nature of the scenario. This is where things diverge the most. What follows is a brief commentary on the types of adventures. While it's probably not necessary, I'm spoilering it, just in case.
[ Spoiler ]
SRM02-01 is a delivery job. The scenes along the way are literally, on the way to make the drop off.
SRM02-02 is an extraction. The scenes along the way are trying to track down the target.
SRM02-04 is a disruption job. The scenes along the way are hooks for different types of disruptions.
SRM02-05 is an investigation. The scenes along the way are the clues.
SRM02-07 is a heist job. The scenes along the way are mostly the target of the heist.
SRM02-09 is a traditional dungeon crawl. The scenes here are the rooms in the dungeon.
SRM02-11 is a datasteal. The scenes along the way are complications for completing the datasteal.
SRM02-14 is an assassination. The scenes along the way mostly cover the security for the target.
SRM02-16 is a bodyguard job. The scenes along the way are mostly things to bodyguard against.
SRM02-22 is a run gone bad. The PCs find are the prey, not the predators, and need to defend against the encounters.
Most of the other scenarios are variations on these common themes, but with some different twists to keep things interesting.
Finallly, there's a Picking up the Pieces section to determine awards, followed by a Cast of Shadows to detail the NPCs.
Or, do you mean something else entirely?