采购管理系统技术架构设计：流程图拆解 + 核心模块搭建详解

// 采购审批工作流示例
public class PurchaseApprovalWorkflow
{
    public void StartApproval(PurchaseRequest request)
    {
        // 根据采购金额确定审批流程
        if (request.Amount > 100000)
        {
            // 大额采购需要三级审批
            StartThreeLevelApproval(request);
        }
        else if (request.Amount > 50000)
        {
            // 中额采购需要二级审批
            StartTwoLevelApproval(request);
        }
        else
        {
            // 小额采购直接审批
            DirectApproval(request);
        }
    }
    
    private void StartThreeLevelApproval(PurchaseRequest request)
    {
        // 三级审批逻辑实现
    }
}

// 供应商评分算法示例
function calculateSupplierScore(supplier, purchaseItem) {
    // 基础评分项
    let score = 0;
    
    // 价格因素（权重40%）
    score += (1 - supplier.price / purchaseItem.marketPrice) * 40;
    
    // 质量因素（权重30%）
    score += supplier.qualityRating * 30;
    
    // 交货准时率（权重20%）
    score += supplier.onTimeDeliveryRate * 20;
    
    // 服务评价（权重10%）
    score += supplier.serviceRating * 10;
    
    return score;
}

-- 采购品类分析查询
SELECT 
    category_name AS '品类',
    COUNT(*) AS '采购次数',
    SUM(amount) AS '总金额',
    AVG(unit_price) AS '平均单价',
    MIN(unit_price) AS '最低价',
    MAX(unit_price) AS '最高价'
FROM 
    purchase_orders
JOIN 
    items ON purchase_orders.item_id = items.id
WHERE 
    order_date BETWEEN '2023-01-01' AND '2023-12-31'
GROUP BY 
    category_name
ORDER BY 
    SUM(amount) DESC;