[phase eins]. is headed by the two partners with equal rights Benjamin Hossbach and Christian Lehmhaus. The firm has been founded in 1998 by Hans-Peter Achatzi and Benjamin Hossbach, in 2001, Christian Lehmhaus joined the firm as partner, in 2004, Hans-Peter Achatzi left the company.
Specialization	[phase eins]. is a company with a team of architects and other professionals specialized in consultancy in "phase one" of projects in the fields of architecture and urban planning. Our profile covers the performance of all steps required for the preparation of project fundamentals, the fine-tuning of project design and the selection of the optimum partner for the subsequent stages of planning. Our core competence is the management of competitions and other tender procedures in all fields of planning. Our specialization provides the promoter with the liberty to entrust the further stages of planning to architects other than the consultants in the first phase.
Competence	[phase eins]., for conducting design studies, developing mediating strategies for conflict resolution and coordinating competition procedures, can draw on many years of experience and a wealth of technical expertise. We have at our disposal exhaustive know-how in the material and technical running of projects at various scales and in different fields in Germany, Europe as well as other countries world wide. Their gamut comprises both building and urban design as well as adjacent fields such as landscape architecture, new media and architecture-related plastic and pictorial arts.
Dependability	[phase eins]., having run many highly sensitive, complex and demanding projects, has at its disposal the understanding and sensitivity required for acting commensurately in any given situation, while always placing into the foreground loyalty and responsibility vis-à-vis the sponsor and the project.
State-of-the-art technique	[phase eins]. continually keeps developing its working procedures, analytical and presentational tools so as to provide sponsors with the highest level of planning security and assure peak quality.
Authenticity	[phase eins]., before specialising in competition management, acquired many years of experience by participating in numerous competitions, working in architectural planning as well as in the development and control of industrial projects on behalf of the sponsor.
Renomee	[phase eins]., enjoying worldwide renown for its expertise, is an active member of various specialist work groups formed within the framework of both the Association of German Architects (BDA), the Architects’ Chambers and the German Association of Consulting Engineers (VBI) contributes to the architectural discourse by holding lectures at universities and in conferences as well as by contributing features in trade journals. The quality and importance of our work have been acknowledged in numerous articles published by leading German and international magazines.