Step 1: Concept
Henri Fayol developed 14 principles of management to guide managerial decision-making and organizational behavior.
Step 2: Meaning
One core principle dictates that managers should treat their subordinates as fairly and impartially as possible, rewarding merit and competence.
Step 3: Analysis
• The scenario describes a situation of bias, where seniority is valued over actual competence and capability.
• The principle of "Equity" emphasizes kindliness, justice, and fair play in dealing with employees.
• By overlooking a highly capable employee in favor of a less competent senior, the management is acting unfairly and creating a discriminatory environment.
Step 4: Conclusion
The principle of management being explicitly ignored in this discriminatory promotion practice is the Principle of Equity.
Final Answer: Principle of Equity