Rok Prešeren, by education experimental physicists, is active in software product creation and development for over 20 years. Starting his career with development of x-ray analytical apparatus, he worked on such various products as GSM switching, WiMAX base stations, mobile applications and streaming, risk analysis tools, cloud printing and remote management and operation of color dispensers.
He lead various development teams and managed departments. While managing and executing projects he is regularly irritated by tremendous effort waste and defocus in form of explanations, justifications and advocacy of project discrepancies relative to initial estimations. Through his daily work he tries to discover better systematic ways for initial project estimations to raise the project success rate.