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最少资源化下,如何利用Excel 做生产计划

  • 2026-04-06 12:04:04
最少资源化下,如何利用Excel 做生产计划

问题背景

如何利用Excel 做生产计划,利用线性规划模型来进行设计。约束条件为三条产线,产线一每天产量1500,需要工人2人。产线二每天产量1800,需要工人4。产线三每天产量2400。需要工人6人。现需要50000件产品。怎么计算最少人工?

在Excel中利用线性规划求解最少人工的步骤如下:

1. 打开Excel,在单元格中输入以下数据:
  · A1、B1、C1分别输入“产线一”、“产线二”、“产线三”。
  · A2、B2、C2作为可变单元格,用于存放各产线的生产天数(初始可设为0)。
  · A3输入“日产量”,A4输入1500,B4输入1800,C4输入2400。
  · A5输入“所需工人”,A6输入2,B6输入4,C6输入6。
  · 在D2输入公式=SUMPRODUCT(A2:C2, A4:C4)计算总产量。
  · 在D4输入目标产量50000。
  · 在D6输入公式=SUMPRODUCT(A2:C2, A6:C6)计算总人工。
2. 调用规划求解工具:
  · 点击“数据”选项卡,在“分析”组中找到“规划求解”(若未显示,需先加载项中启用)。
  · 设置目标单元格为D6,选择“最小值”。
  · 可变单元格为A2:C2。
  · 添加约束:D2 = D4(总产量等于50000),以及A2:C2 ≥ 0。
  · 选择求解方法为“单纯线性规划”,点击“求解”。
3. 结果分析:
  · 求解后,A2:C2将显示最优天数:产线一为33.3333天,产线二和产线三为0。
  · 最少人工(总人天)为66.6667,即D6的值。

此结果表示,仅使用效率最高的产线一(每人工日产量750件)即可满足需求,无需启用其他产线。若要求天数为整数,则需添加整数约束,此时最优解为产线一运行34天,人工68人天。

下面我用线性规划(Linear Programming)的方式,一步一步说明:

如何建模

如何手工计算最少人工

如何在 Excel(规划求解 / Solver) 中实现

一、问题抽象(建模)

1. 决策变量,设:

  • x1:产线一生产的天数


  • x2:产线二生产的天数


  • x3:产线三生产的天数


(天数可以是小数,符合线性规划假设)

2. 已知参数


产线



日产量



用工



产线一



1500



2



产线二



1800



4



产线三



2400



6

3. 目标函数(最少人工)

总人工 = 每日产线用工 × 生产天数

\min Z = 2x1 + 4x2 + 6x3

4. 约束条件(产量)

总产量 ≥ 50000:

1500x1 + 1800x2 + 2400x3 大于等于50000

非负约束:

x1, x2, x3 大于等于0

二、先做“单位效率”判断(核心思想)

这是线性规划中非常关键的一步。

1. 每 1 人·天能产多少?


产线



日产量



人数



单位人效(件/人·天)



产线一



1500



2



750



产线二



1800



4



450



产线三



2400



6



400


结论

👉 产线一的人效最高,在“只追求最少人工”的目标下:

所有产量都应该优先放在产线一

三、最优解(手工计算)

只使用产线一:

x1 = 50000/1500= 33.33 天总人工:

Z = 2 × 33.33 = 66.67 人·天

四、最终答案(数学意义上的最优解)

最少人工 = 66.67 人·天

生产方案:全部使用产线一

五、Excel 中的实现方法(规划求解 Solver)

1. 表格结构示例


A列



B列



C列



D列



产线



日产量



用工



天数(变量)



1



1500



2



x1



2



1800



4



x2



3



2400



6



x3


2. 计算公式

  • 总产量单元格:

=SUMPRODUCT(B2:B4, D2:D4)
  • 总人工单元格:


=SUMPRODUCT(C2:C4, D2:D4)

3. Solver 设置

  • 目标单元格:总人工 → 最小值


  • 可变单元格:x1, x2, x3


  • 约束条件

    • 总产量 ≥ 50000


    • x1, x2, x3 ≥ 0

  • 求解方法:单纯形 LP

六、实际生产中常见补充

在真实生产中,通常还会加入

  • 每条产线最多可运行天数


  • 工人总数上限


  • 产线必须整天运行(整数规划)


  • 多产品组合需求

通过百度网盘分享的文件:linear p....xlsx

链接:https://pan.baidu.com/s/1hVWrubNpFilJEt6pBJ6gow 

提取码:LAS4 

复制这段内容打开「百度网盘APP 即可获取」

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  1. CONNECT:[ UseTime:0.001113s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001378s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001795s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000620s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001195s ]
  6. SELECT * FROM `set` [ RunTime:0.000495s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001334s ]
  8. SELECT * FROM `article` WHERE `id` = 475643 LIMIT 1 [ RunTime:0.020109s ]
  9. UPDATE `article` SET `lasttime` = 1775815176 WHERE `id` = 475643 [ RunTime:0.014835s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.008886s ]
  11. SELECT * FROM `article` WHERE `id` < 475643 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001553s ]
  12. SELECT * FROM `article` WHERE `id` > 475643 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001562s ]
  13. SELECT * FROM `article` WHERE `id` < 475643 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.026524s ]
  14. SELECT * FROM `article` WHERE `id` < 475643 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009240s ]
  15. SELECT * FROM `article` WHERE `id` < 475643 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.015885s ]
0.248631s