Failure to establish and maintain adequate procedures for the identification, documentation, validation or where appropriate verification, review, and approval of design changes before their implementation as required by 21 CFR 820.30(i). For example: Your firm issued an ECN (R9180) on July 7, 2009, which changed the revision of the controller software used in the 300B and 700B model scooters from revision #8 to revision #9. This change increased the motor resistance from [redacted]. There is no documentation to indicate that this change was validated/verified .
View the original warning letter.