Hi June V,
Contrary to popular belief that the higher the designation, the longer the probation period, it's actually the other way round.
The reason is that the probation period is used to assess a new joiner's skills and capabilities and to help him/her adapt to the office culture. When we onboard senior/middle-level professionals with considerable experience, they already come with a proven track record of skills and capabilities. Hence, it is assumed that they hit the ground running.
Having a lengthy probation period for senior/middle-level managers, whose skills have already been measured and accepted, is a waste of time.
Therefore, the probation period for senior/middle-level professionals is usually only 1-2 months. However, their notice period is longer (6-8 months) as they will have many tasks to complete or hand over, finding a replacement at that level would be difficult, and the impact of seniors leaving the organization is more significant compared to lower-level employees.
Also, a 1-year probation is mainly applicable to trainees where on-the-job training is necessary for them to be useful to the company. These trainees work on different areas in their field during that one year. If OJT is not required, then the standard probation period is just 3 months.
A recent survey shows that the learning curve from generation to generation is different, and Gen X & Y learn things faster. So having a long probation doesn't seem necessary if they can grasp things faster.