Developing a Rewards Program

[soudy1]

so im working on this promotion to management, i need to develop a rewards program for our call center. we have about 20 people on the phone now but will have 60 within 6-8 months. the goal is to motivate our staff to hit their goals(rank1 needs 20/ rank 2 needs 40/rank 3 needs 50-per day) and in the last 2-3 months they have not been hitting the numbers. so i was put incharge to develop a credit/rewards system to motivate and maintain and exceed their goals. i was thinking something like if they hit there goal they get 5 points(rank 1 =5 ...rank2=10...rank3=15) points per sale over their goal.you dont earn any points if you donot hit their goal? to harsh? will not just buzz kill the entire program? we do fun cc games for like an extra 5 bucks or 25 gift cards etc.but with your points/credits u can buy things like movie tickets..and for alot of points like TV's or moniters..and medium items like upgraded headsets,dvds concert tickets etc etc..everyone is different so were going to have a wide range of items for everyones liking or to the best of our ability. im not set on the points per sale or points per rank. or any type of conversion rate like that DVD may be 50 rank 1 points..and 25 rank 2 points. etc etc..or make it all one credit "value" but rank 3 wont be able to get points until they hit 50 which is alot tougher, and maybe not even hit it that day or twice a week\-maybe. should their be a cap on how many points a trainee can hit daily? just because there new doesnt mean they Cant hit 40-50 a day if their good. so there needs to be a daily cap..
the goal is the motivate our staff to hit there numbers and strive for the big prizes, aswell has increase attendance, which isnt that bad but it can be improved and ultimatly increase morale .thanks
soudy