[contingencies]

A few... lack of standard transaction identifiers, fixed hours of business with bespoke holiday schedules, use of humans, use of telephones, physical travel to trade shows, printed literature, cold calling/emailing, manual price checks, incapacity to provide actual volume or delivery dates prior to purchase, manual pricing, non-transparent pricing, manual provisioning and re-entry of client and supplier information such as corporate identity, tax, banking and addresses; bait and switch, tedious inefficient reputation systems, lack of machine-readable digital specifications, lack of 3D models, lack of (translated) documentation, material/regulatory/supplier certificates and associated documentation that is impossible or tedious to verify... one could go on.

[cardamomo]

Among these, "use of humans" stands out.