This addendum expands the usefulness of the Standard 35 (JESD35) by detailing the various sources of measurement error that could effect the test results obtained by the ramped tests described in JESD35. Each source of error is described and its implications on test structure design is noted. This addendum can be used as a guide when designing test structures for the qualification and characterization of thin oxide reliability, specifically, by implementing accelerated voltage or current ramp tests.