To ensure ongoing usability of layers, what method should administrators consider for regular updates?

Selecting the approach of assessing the need based on item usage is vital for maintaining the usability of layers in ArcGIS Online. This method prioritizes user engagement and actual demand when determining which layers require updates. By focusing on how frequently a layer is accessed or utilized, administrators can ensure that the most relevant and necessary data is kept current, ultimately enhancing user satisfaction and making efficient use of resources.

Considering usage allows for a more dynamic and responsive management strategy that adapts to the needs of users rather than following a predetermined schedule that may not align with actual usage patterns. This flexibility can help prevent the unnecessary expenditure of time and resources on layers that may not require frequent updates. Additionally, it fosters an environment where data relevancy and accuracy are closely aligned with user needs, ensuring that users are always working with the most pertinent information.

In contrast, scheduling updates based on thematic relevance, updating on a fixed date annually, or automating updates through external scripts may not effectively align with user behaviors or the actual importance of data layers. These methods can lead to oversights where critical, high-usage layers are neglected or unnecessary updates are performed on less critical layers, ultimately impacting the overall effectiveness of the GIS system and user experience.