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Handbook of Sustainable Design of Digital Services

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Do you inform users of the size constraints and accepted file format ?

Recommendation 

transfers

A People

B Planet

A Prosperity

Difficulty

*

Priority

High

Récurrence

OnUpdate

Tests

Are file sizes and formats limited and exposed to users?

Precisions

Front-end operations may require file transfers between the user workstation and the processing servers. The types and volumes of files accepted must be exposed to the user to avoid transfer loads, storage and processing that would be doomed to failure due to non-compliance with expected formats and volumes. Limiting the volume is essential to reduce the impact of transfers.

Use Case

User journey

Additional elements

Operational issues related to the project

Posts

Rule for assessing the level of compliance of the criterion

Formalized = 100 ; Planned = 75 ; Identified = 50 ; Ignored = 0 / 100

Life cycle

Utilisation

8 other criteria related to the recommendation: Limit the use of hardware components or sensors on user terminals

Recommendation

Technology

Are the sensors being used as needed, rather than constantly ?

Recommendation

Technology

Are the pause functions available ?

Advice

Technology

Is the inaccessibility of a sensor, linked to the equipment or to the user's choice, treated to allow the service to be functional nonetheless (if possible) ?

Advice

Technology

Are predictive algorithms in place to avoid the use of physical sensors ?

Advice

Technical User Experience

Is the frequency of the animation appropriate for the functionality ?

Recommendation

transfers

Do uploads only allow the list of authorized file types ?

Recommendation

transfers

Are the images to be uploaded properly resized and converted to a thin client-side format before transfer ?

Recommendation

transfers

Are the exchanged files compressed ?