During installation, construction supervision is essentially limited to the documentation of process parameters (temperature, pressure, pulling force, etc.). In this way, the causes of any quality deviations that may be detected can be determined during subsequent acceptance of the rehabilitation work. Only in the case of longer-term measures with several renovation phases is it possible to use the results of the first quality checks for corrective measures in the subsequent renovation phases. So-called "construction-accompanying" material tests (see section on material tests) are also only carried out after the lining tube has already been installed and cured in the host pipe.