This software meanwhile is optimized since years and now is an engineering companion, if it comes to bolted joints. A system for virtual consulting with application-specific warnings and recommendations as well as info-sources and functional modules for fast and right  analytical modeling including an assessment and process orientation make engineering work easy. Besides this, the software is really intuitively to use (direct response of results, large help-support) and avoids a lot of uncertain estimation-factors for input, which often are not known.