一、核心数据流图（DFD）1. 顶层图（上下文图）2. 一级数据流图（核心业务流程）二、实体关系图（ER图）核心实体及关系主要实体属性说明实体主要属性PLATFORM（平台）platform_id, name, levelVEHICLE_FACTORY（整车厂）factory_id, name, contact, platform_idDEALER（经销商）dealer_id, name, level, parent_id, factory_idUSER（用户）user_id, name, phone, id_cardVEHICLE（车辆）vehicle_id, vin, model, status, dealer_id, factory_idORDER（订单）order_id, user_id, vehicle_id, start_time, end_time, total_amount, deposit, statusPAYMENT（支付）payment_id, order_id, amount, type, status, third_party_noCOMMISSION_RULE（佣金规则）rule_id, factory_id, level1_rate, level2_rate, level3_rateCOMMISSION（佣金记录）commission_id, order_id, dealer_id, amount, status三、状态转换图1. 订单状态转换图2. 佣金结算状态转换图