Final answer:
The advantages of a dedicated structure include promoting strategic alignment, while the disadvantages involve isolation of HR units and potential inefficiencies.
Step-by-step explanation:
A dedicated structure in an organization has both advantages and disadvantages. On the advantages side, it promotes strategic alignment between headquarters and units, ensuring that they work towards the same goals. On the other hand, there are disadvantages like the isolation of dedicated HR units, which can lead to a loss of shared knowledge and experience. In addition, it may also result in duplications and inefficiencies within the organization.