Mano jausmas, kad tai parašė ne „native speaker“.

Pirma, trūksta kablelio. "With essential security functions, replacement 
of an employee is guaranteed."

Dalį "With essential security functions," aš suprantu kaip „Kas liečia 
sugumo funkcijas“.

Taigi, turbūt:

„Saugumo funkcijų atžvilgiu, darbuotojo pakeitimas garantuotas.“

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On 10/01/2011 4:45 AM, Junda wrote:
> Negaliu suprasti šio sakinio prasmės, gal kas padės:
>
> With essential security functions replacement of an employee is guaranteed.
>
> Visas kontekstas (kalbama apie IT saugumo politiką):
>
> SECURITY ORGANISATION AND INFRASTRUCTURE
> 5.1. Essential decisions regarding security are taken by chief security
> in cooperation with management.
> 5.2. Security situation is reviewed once a month when performing company
> risk evaluation.
> 5.3. Liabilities in the field of security have been determined by
> internal regulations, orders of the general director and job
> descriptions. With essential security functions replacement of an
> employee is guaranteed.
> 5.4. Punishments determined by standing orders of the house are applied
> in case of misuse of property available to an employee.