Havas advertising; “We have worked with WorkBook for over 5 years now. We have a tool that helps us in planning & managing our resources, client billing and a complete overview of revenue for our clients. We can easily and quickly see the WIP value of our work and a few days after month end, we can easily and accurately determine the period result. Our WorkBook is integrated Microsoft Business Solution NAV and this works fine. WorkBook is indispensable for our project managers and for our accounting department.”