系统管理员用户能完成以下功能：创建系统新用户，可以查找、浏览和更新用户信息；输入、查询、浏览、更新菜单信息；统计分析功能（如统计每个菜品被顾客选择情况、每个服务员每餐或每天服务顾客数量等）；
服务员用户能完成以下功能：顾客信息录入（可以分店内消费、自带等）；菜单信息查询、浏览；c)顾客点餐以及点餐情况浏览、修改、删除、状态更新等功能；费用计算；((1) there is a simple user management function. There are two types of users, system administrators and attendants in the system. Different users will have different menus for different operations after the landing system.
(2) the system administrator user can complete the following functions: a) to create a new user system can search, browse and update user information; b) input, query, browse, update the menu information; c) statistical analysis functions (such as the statistics of each choice, each dishes by the customer or customer service staff for each meal every day the number of D)); (optional) input, query, browse and update the table information (such as position, can take a few people); E) (optional) customer information browsing.)