The contradiction in the principle of unity of command and the technique of functional foremanship is in the way a subordinate reports to his superior or boss.
According to Taylor’s principle of unity of command, in an organization, a subordinate should report to and take orders from only one boss at a given point of time.
Based on the technique of functional foremanship, a subordinate will be under the supervision of several specialists that makes the former obliged to report to all the specialists.