The aim of this work is to respond to shortcomings in tractor cab layout design by deriving a working process for the creation of visual guidelines of comfort and comfortable reach, i.e. comfort and reach envelopes. This working process was the result of an illustrative case, where reach and comfort envelopes were created with the help of digital human modeling programs as well as CAD software for the tractor developer and manufacturer Valtra Inc. The conclusion of the study is that better target group accommodative comfort and reach envelopes can improve cab layout design related to comfort and work safety. Moreover, a general working method allows for optimization of ergonomic requirements for the specific design by permitting full control of each work step.