This paper develops a model of the factors deemed critical for success in high-tech new ventures in Israel. Israel presents an interesting forum, geographically distant from main markets but richly endowed with human capital, new high-tech ventures are seen as an essential element of the economy. Yet, despite its importance, high-tech is characterised by risk and challenge. Consequently a model which draws on the experience of success and failures should be valuable. Our multi stage methodology enrolled the wisdom and experience of founders, managers and financiers of high-tech businesses to identify and categorise the importance of the factors and the role played by these factors. We found that success factors could be grouped as critical or as important. The first group categorised the idea, strategy, the core team's commitment, expertise and marketing as critical. Important factors were deemed to be management, customer relationships and research and development. The least important factors proved to be those external to the firm, the economy, politics and the general business environment. Overall the study emphasised that the attitudes and abilities of the core team were paramount. Although the model is based on the Israeli experience, many of the aspects are global. Consequently the study may have broad applicability.