Could disallow users from entering names that differ only in case (e.g. tom and Tom are the same person) since the product disallows employees with the same name from being added. Alternatively, maybe you could allow this instead, since there may be more than one employee with the same name and this would inconvenience the restaurant manager if he cannot schedule someone using this app just because the person has the same name as an existing employee.
Could disallow users from entering names that differ only in case (e.g. tom and Tom are the same person) since the product disallows employees with the same name from being added. Alternatively, maybe you could allow this instead, since there may be more than one employee with the same name and this would inconvenience the restaurant manager if he cannot schedule someone using this app just because the person has the same name as an existing employee.