Identify the bottleneck operation in the following exclusive hairdressing salon. 
Definitions:
Salaries Payable
An account that records the amounts owed to employees for work performed that has not yet been paid.
Social Security Tax
A tax that both employers and employees pay to fund the Social Security program, which provides benefits for retirees, disabled workers, and survivors.
Unfunded Pension Liability
The gap between the projected benefits of a pension plan and the assets available to fund those benefits.
Pension Rights
The entitlements that employees accumulate over time that entitle them to receive benefits from a pension plan upon retirement.
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