What is the difference between TIG and TIS in WAPS scoring?

• A. TIG is total time in service; TIS is time in current grade.
• B. TIG is time spent in the current grade; TIS is total time in service; both contribute but in different ways.
• C. TIG and TIS are the same metric.
• D. TIS is based on performance, TIG is based on time.

Answer: (B)