How long will it take me? About 10-12 weeks on average, if you follow the tailor made Pre-Audit Action check list we provide. Our e-Book explains more.FAQSHow Does Your Service Work?How long will it take me?How much work will I have to do?Will I have to employ another person to help maintain this?What can I expect during an audit?ISO 27001 Timeline Combined ISO9001, ISO45001 and ISO14001 Timeline