; (2) provide for adequate training and retraining for supervisors, managers, and employees in the implementation and operation of that redesign and that system; (3) develop— (A) a comprehensive management succession program to provide training to employees to develop managers for the agency; and (B) a program to provide training to supervisors on actions, options, and strategies that a supervisor may use in administering that system; (4) include effective transparency and accountability measures and safeguards to ensure that the management of that system is fair, credible, and equitable, including appropriate independent reasonableness reviews, internal assessments, and employee surveys; (5) provide mentors to advise individuals on their career paths and opportunities to advance and excel within their fields; (6) develop appropriate procedures for warnings during performance evaluations for employees who fail to meet performance standards; (7) utilize the quadrennial strategic plan required under section 7330C(b) of title 38