Tesseract ('tes‚rækt) n. the 4-dimensional equivalent of a cube.
[C19: < Ionic Gk tesseres four + aktis ray]

A short science fiction story tells of a scientist who invented a tesseract and built it into a house, which he then got trapped within. It seems that whichever way he went he ended up back in the room from which he started. He found that to escape he had to think about the situation in a totally different and unconventional way.
To us, this is analogous of management who tend to design their own operating structures and then appear to become trapped within them - driven by the very system that they themselves created. The 'Top-Box' model is our proposal that they should lift themselves out of their situations and look differently upon it.
To understand more about Tesseracts, click on the links below:

Tesseract Management Systems	management consultancy specialising in systematic management processes
Tesseracts	publishers of 'Managing by Design' and internet based support for those working to implement systematic management approaches
The Peinao Trust	charitable fund for supporting work on alleviating physical, emotional and spiritual hardship
Michael Clargo	author of 'Managing by Design' and director of Tesseract Management Systems