Posting one more time; David Packard's (of HP fame) address on "How to be a Manager in a Technical Company" -

https://gizmodo.com/the-hp-way-how-bill-hewlett-and-i-built-...

One thing i noticed in discussions like this one is the amount of excuses made for Management's/Manager's lack of Technical Proficiency. This has to stop. If you are in a Technical Domain and leading/managing Technical People you have to know the domain decently well. There is no other alternative. Else you are reducing the effectiveness of your Engineering Team and the Company as a whole to your level of incompetency. The resulting effects may not be visible immediately but sooner or later you will drag the company down to oblivion (eg. see what happened to the same HP).