How good is it really?

Ok first off, in order to rate what we will call "zombie weapons" I need to set certain guidelines. These guidelines will be the base for how I will rate each weapon. Obviously there will be intangibles that can't be measured. Maybe you just can't bring yourself to wack a zombie with your signed Wayne Gretzky hockey stick you just pulled out of the display case, or perhaps that signed hockey stick belonged to your cheating ex husband and smashing zombies with it gives you more pleasure then you would have thought. Either way there will always be elements that can't be measured. But on the whole I can start basing my decision making off of these variables:

Durability:
Pretty self explanatory. It really doesn't matter how deadly your weapon is or how awesome you are at wielding it. If the damn thing breaks after taking out 2 zombies, then I'd say that particular weapon is pretty much useless.

Availability:
I imagine that during a zombie apocalypse having a tank to roll around in would be pretty solid. However, personally I don't know anyone with a tank parked in their driveway. Hence availability will come into play. Basically this will boil down to how hard it would be to find that weapon. Awesome or not if you can't get your hands on one then what good is it?

Agility:
This one will be a little harder to rate. A heavier weapon can do more damage but would wear you out much faster. It will also depend on who is using it. A 6' 5" 250 lbs construction worker won't have much of a problem swinging around a 10lbs weapon. However hand that over to a 110lbs secretary and not much is going to be accomplished. So I will try and base my decisions on an average person and how easy it would be to use the weapon.

Cost/Consumables:
I'm not talking about cash here. When I mention cost I'm talking about what you have to give up to use the weapon. For e.g. if using the weapon is extremely loud and could attract some more unwanted attention then the "cost" of use will be higher. Consumables is what will be "consumed" or depleted with each use of the weapon. A high powered handgun can be pretty devastating in the right hands, but take away the ammunition and it's pretty much a paper weight.

Lethality:
Will it kill it? Yes. 
Good. 
Will it kill it quickly and easily? Yes.
Perfect!

Adaptability:
When chatting zombies with people, the topic of scavenging usually makes it's way into the conversation. Being able to adapt random scavenged items into something usable is a vital part of post apocalyptic survival. The same holds true for rating weapons. Being able to take a simple weapon and with some MacGyver like skill, modify it into something much more formidable could be a game changer. Who would have thought a toaster, 2 paper clips, a can of pringles and a lighter could become a zombie's worst nightmare.

Miscellaneous:
For better or worse some weapons could carry with them other elements that could make a difference. If I think of any thing that does't fall into the other categories this is where is will end up.

I think thats about it. I will use this as my basis for ranking each weapon as I work my way through the vast list of zombie dispatching tools out there. If there is something that I've missed that you feel should be in here. Let me know.