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.
Team performance appraisals are appropriate to support an organization's efforts to transition from an individual-based organization to an team-based organization. Team performance appraisal, for example, assess whether the team met its goals, produced a quality product and worked well together.