Preferred method to program the DA14580 OTP - Murata module in series

Hi Dialog Team,

In meantime our application is running . It’s booting from SPI flash. Now, we will produce few devices for a test series and will program them by UART and Smartsnippets. That’s no problem.

But in main series, the application software must run in the OTP. What is the preferred method to program the devices, when we will produce up to max 5k devices per year? I know, one way is to buy the devices preprogrammed from the distributor / Murata - But when we will do that first by our self … I know, we need the 6.8V VPP. Is there a special programmer, we can buy somewhere? Working by UART or JTAG, and by Smartsnippets? What option is the easier or better one UART or JTAG?
Is it the easiest way to use the socket which has all Pins of the Murata module on Muratas DevKit? But without DaugtherBoard ZYZS? Or should we use Dialog DevKit for programming the OTP?

Theres is a note in AN-B-20: “Please note, 6.8V can only be applied to VPP after VBAT3V is supplied and 6.8v must be removed from VPP before the supply to VBAT3V is removed. Otherwise the chip could be damaged.The 6.8V supply must be applied without ringing. The overshoot could also cause damage“
How is that realized? By Smartsnippets CLI commands?

Thanks for answer in advance. Have a nice day!