How to use the rules in Gruntfile.js

[JyotiPrakashMallick]

How can I use the following Parameters in my Gruntfile.js

• totalWeight: total number of bytes downloaded compare to the isOkThreshold
• imageOptimization: number of bytes that could be saved by optimising images compare to the isOkThreshold
• gzipCompression: number of bytes that could be saved by compressing file transfers compare to the isOkThreshold
• fileMinification: number of bytes that could be saved by minifying JS, CSS and HTML compare to the isOkThreshold

[gmetais]

failConditions: [
    'fail if at least one url has a totalWeight > 2000000', // = 2MB
    'fail if at least one url has a imageOptimization > 100000' // = 100KB
]