scale rate to evaluate punctuality & reachability

Hello,

Do you evaluate vendor punctuality?

Do you register in some way who uses to deliver on-time and who doesn't?

Does anyone find usefull to have a scale rate to evaluate wether the vendor deliver on time or not?

And what about reachability? Wouldn´t you find usefull for your PMs to know if a vendor is easily reachable or not? For example to discard those who don't reply fast when you are looking for someone for an urgent request.

Laura