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Today, there are specialised software solutions for every task area and even the large software suites (integrated ERP software, CRM software, ECM software, etc.) map more and more company areas more or less completely.
The question of whether one's own requirements can be better met by an integrated system or a best-of-breed approach must be answered individually by each company. The integrated systems usually do not offer such comprehensive functionalities; a best-of-breed approach requires more interfaces, which can certainly cause considerable complexity in the operation and maintenance of the software landscape.