But you can represent up to 999 lab techs with only 1 more digit. Or 946 lab techs with just 2 alpha numeric characters. Heck just 2 letters gets you 676 combinations. About 17,000 combos with 3 letters and more than 40,000 if you use 3 alphanumeric characters.
YYMMDD-SITE-SAMPLE_ID
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Until you have more than 100 lab techs
But you can represent up to 999 lab techs with only 1 more digit. Or 946 lab techs with just 2 alpha numeric characters. Heck just 2 letters gets you 676 combinations. About 17,000 combos with 3 letters and more than 40,000 if you use 3 alphanumeric characters.