This is the 2065th most frequent Russian word.
единой
Unified; single; one.
In this sentence, "единой" is used as an adjective meaning "unified" or "as one," describing the team.
Мы должны работать как единая команда.
We must work as a unified team.
Here, "единой" signifies "common" or "shared," relating to the goal that unites them.
У них есть единая цель — добиться успеха.
They have a common goal — achieving success.
In this case, "единой" implies "integrated" or "comprehensive," referring to the management system.