QUESTION: From: Muhammad Irshad Sent: March 1, 2013 To: ATCS – QBlog, Ask The Experts What type of evidence must be provided to prove API Q1 requirements for corrective actions have been met?  How can we determine that our corrective actions are effective? RESPONSE: From: Bill Aston, ATCS – QBlog, Ask The Experts Sent: March 2, 2013 Hello Muhammad, Thanks for contacting Aston Technical Consulting Services’ QBlog.  With regard to your question, ISO 9001, clause