Recommendation : 9. Implement technical solutions with the lowest impact
Have the different image formats available been evaluated to select only the most effective ?
UI
B People
A Planet
A Prosperity
Difficulty
**
Priority
High
Récurrence
OnUpdate
Tests
What is the total volume of images for the service?
Precisions
Digital services use images for illustration or information purposes. The sizes, degrees of definition, encoding formats have a significant impact on the size of the files of these images. Reducing volumes makes it possible to limit environmental footprints.
Use Case
Browser tools/consoles allow to check data transfer, size & frequency (CHROME: console / network)
Opquast 22 - 76 / GreenIT 36 - 80
Additional elements
Operational issues related to the project
Rule for assessing the level of compliance of the criterion
Number of images analyzed / Number of images
Life cycle
Réalisation
20 other criteria related to the recommendation: Implement technical solutions with the lowest impact
UI
Is a clean version available for prints ?
user Experience
Is the service suitable for different accessibility media formats ?
UI
Are image resizing processed upstream and statically (server side) ?
UI
Is the definition of the image reduced and adapted to its objective (illustration, contractual, ...) ?
UI
Do all images have a text alternative ?
UI
Are alternative image formats made available through srcset ?
UI
Are CSS sprites implemented to limit the flow of image fetching ?
UI
Is formatting in css preferred, to limit the use of images ?
UI
Does the lazy load bring a gain (weight of the page, CPU resource) ?
UI
Is the definition of the sound suitable ?
UI
Is it really a user action that triggers the "play" ?
UI
Are videos or animations outside the active area automatically paused / stopped ?
UI
Is a video the only solution for the expected illustration ?
UI
Are you reducing the number of pictograms used in the service ?
UI
Do you limit the number of fonts loaded for the service ?
UI
If printing, is an ink saving font installed ?
UI
Are the fonts used not loaded only for a small number of objects ?
UI
Is the service developed in accordance with RGAA recommendations ?
UI
Are the animations necessary, desired by the user ?
user Experience
Is a CSS alternative available for an animation ?