The technical coefficient represents the efficiency of the system in use for particular resource and expresses the average state of technology. The decrease of "T" would indicate a gain in efficiency however “I” could still be growing or remaining stable if the improved technology is not sufficient to compensate the effect of an increase in "P" and "A". Therefore, a reduction in “I” would always mean that pressure on resources has lightened but this might not always be the consequence of using resources more efficiently (reducing T).