According to this principle of scientific management, “Scientific management has for its foundation the firm conviction that true interest of the management and workers are one and the same; the prosperity for the employer cannot exist for a long time unless it is accompanied by prosperity for the employees and vice versa.”

Harmony, not discord

The correct answer is option 3- Harmony, not discord.

The principle described in the statement is "Harmony, not discord."

Harmony, Not Discord: Taylor emphasized that there should be complete harmony between the management and workers. Both should realise that each one is important. To achieve this state, Taylor called for complete mental revolution on the part of both management and workers. It means that management and workers should transform their thinking. In such a situation even trade unions will not think of going on strike etc. Management should share the gains of the company, if any, with the workers. At the same time workers should work hard and be willing to embrace change for the good of the company. Both should be part of the family. According to Taylor, ‘Scientific management has for its foundation the firm conviction that the true interests of the two are one and the same; that prosperity for the employer cannot exist for a long time unless it is accompanied by prosperity for the employees and vice versa’