Involving the management in the BCP process

The main issue was involve all the management in the process. In addition, the turn over and the time management were challenges that need attention.

Can you tell me  how you manage those issues?"

Answer: If you want the management to be involved in your process, they must see clear benefits - otherwise, they won't go along. This article can help you: ISO 22301 benefits: How to get your management’s approval for a business continuity project https://advisera.com/27001academy/knowledgebase/iso-22301-benefits-how-to-get-your-managements-approval-for-a-business-continuity-project/

Regarding time management, it is crucial that you set your project properly - this article can help you (it is applicable to ISO 22301 as well): ISO 27001 project – How to make it work https://advisera.com/27001academy/blog/2013/04/22/iso-27001-project-how-to-make-it-work/