well for me i think it really depends on the nature of the product...
if i am selling something of the future (dunno wad example to use for current technology level cuz it really need to super high tech)
so assuming that we are in the future many many years ago before wheels are invented.... you invented the wheels but people are used to using elephants to carry stuff your wheels won't sell because people do not really know what to do with it... (just like when computers came out took some time before we "accepted" its existance)
this stage is actually stage 1 of the product life cycle... at this stage the important thing is to find "starters" who are people that can think of the future and see that they can use the wheels to make millions (save transport cost and go further distance in shorter time) these people dun need your service because they know what to do with it thats why they buy your product... so it is like close the deal and you all never meet again...
however when it advance to stage 2, service will start to come into play because the will have a rough idea that the product works but dunno how to use... so they need you to help them in using the product... so the service here is in terms of technical stuff... so you need to send them an engineer...
in stage 3 people more or less know your product but they have special requirements... wheels of different sizes and colours and so on... the service now is about what you can do for your customer... how willing are you to go about modifying the current design just for them...
in stage 4 everyone knows what a wheel is and is using it... there are standards now (everyone use 10 inch wheels ) so identical wheels are mass produced... the service now is about fixing wheels for them refund policy and ect (customer service)
so product and service is a bit too general
