The purpose of this Test Procedure is to specify uniform methods of measuring performance characteristics of facsimile systems. Underlying theory is generally omitted as this material is available from other sources, but a brief discussion is given of the principles involved for each measurement. Where possible the measurements call for the use of the IEEE Facsimile Test Chart, which provides a convenient high-quality testing tool. The CCITT has also developed a test chart which is in use in many countries throughout the world. The general measuring procedures are outlined here and the factors which affect the accuracy of the results are discussed along with methods of presenting the results. Not all of the tests described will be significant for all types of facsimile equipment. The user must select the tests which are relevant for the type of equipment used and the intended application.