T

TE (total error)

Total error is the overall error that may occur in a test result due to the imprecision and bias present in the testing procedure. Use the following formula to calculate the TE:

TE_a specifications are available from several sources as described in "Determine Quality Requirements for the Test."

• Total error < total allowable error = test results are generally considered reliable.
• Total error > total allowable error = corrective action should be taken as quality specifications are not being met.

TEa (total allowable error)

Total allowable error is a quality requirement setting limits for the imprecision and bias allowable in a test result. After choosing a TE_a, the TE budget can be calculated. Use the following formula to calculate the TE_a:

trend

A type of systematic error causing a gradual, often subtle increase or decrease in control values and possibly patient results.