Hi Seema,
You are correct; the notice period differs with every position. Every position has different authority, lines of communication, and levels of responsibility. The higher you go on the above parameters, the more important your position is within the organization. There is no difference in functions, but the notice period varies with positions. In my organization, the notice period for VPs and above is 3 months, for middle-level management like managerial positions is 2 months, and for the rest, it is 1 month. This policy is in place because the departure of senior individuals directly or indirectly affects the organization's operations. Additionally, it is easier to replace personnel at the entry level and becomes increasingly challenging as you move up the hierarchy. Issues such as confidentiality, trust, and values need to be thoroughly assessed for individuals in top management positions, making it more challenging, though not impossible, to find the right candidate for those roles.
Regards,
Pooja