Hi Gurus-- I am new to loadrunner and want to parameterize two values, let me give you high level functionality details.

users have bunch of work orders to be processed. What I want to do is, login with 100 users and each user enters work order number and clicks submit, it does furhter process in the back end.

After 100 users login, each one need to go on submitting work order numbers. I recorded the action where single user login and submit one work order number. I did parameterize login id's but trying to know how to incriment work order number in each iteration. The work order number is 20 digit number and each user has unique range of numbers.

It will be a great help if you can guide me how to proceed.

Thanks in advance :-)

same way as you parameterized login.replace the work order number with a paramater.
then open the dat file and paste all the workorder numbers.
in the parameter list select update value on Each Iteration and a new work order number will be used for each iteration