LD50 redirects here. For other uses, see LD50 (disambiguation) . In toxicology, the median lethal dose, LD50 (abbreviation for  lethal dose, 50%), LC50 (lethal concentration, 50%) or LCt50 is a measure of the lethal dose of a toxin, radiation, or pathogen.
In an employee-initiated review system, employees are informed that they can ask for a review from their manager. This type of on-demand appraisal is not meant to replace a conventional review process. Rather, it can be used to promote an attitude of self-management among workers.f a small business uses merit-based increases, the appraisal form would include a rating of the employee on certain tasks. If skill-based pay is used, the appraisal would list skills acquired and level of competency.
A performance appraisal is the process by which a manager: 1. (c) (a) evaluates an employee's work behavior.(b) appraises an employee's attitude about work.(c) evaluates an employee's performance on the job.(d) all of the above.2.or another employee, itcan be a way to research new career opportunities (part of the informalappraisal process).How often the planning, appraisal, and follow-up occur depends on thenature of the work and the structure of the organization.