to very high initial fixed (or investment) costs,
to high monthly (fixed and variable) costs of exploitation over long periods
(rental agreements of offices, salaries, telecoms, utilities
coordination a high burden and workload to be provided by the vendor,
long lead time for implementation and installation,
high Costs in case of closure of the office
(employee compensation and redundancy packages, re-negociation
of office renatl agreements, etc ...).