UpRaise by default has 3 levels of OKRs - Company, team & individual. While this works fine for small & medium-sized companies, some companies will need more depth in their levels of OKRs e.g. with divisional or departmental goals etc.
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On the other hand, software that have only four levels - company, department, team & individual force you into a structure that may not really be suitable for you.
For example, in the above illustration - real world hierarchy vis-a-vis UpRaise hierarchy is explained.