第八章供应链的综合计划
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第八章供应链的综合计 划
2020/12/12
第八章供应链的综合计划
Learning Objectives
1. Identify the decisions that are best solved by aggregate planning.
2. Understand the importance of aggregate planning as a supply chain activity.
stockouts, backlogs, from suppliers
第八章供应链的综合计划
Outputs of Aggregate Plan
•Production quantity from regular time, overtime,
and subcontracted time
•Inventory held •Backlog/stockout quantity •Machine capacity increase/decrease •A poor aggregate plan can result in lost sales,
lost profits, excess inventory, or excess capacity
第八章供应链的综合计划
Identifying Aggregate Units of Production
• Aggregate unit should be identified in a
第八章供应链的综合计划
Information Needed for an Aggregate Plan
• Aggregate demand forecast Ft for each Period t over T
periods
• Production costs
– Labor costs, regular time ($/hr) and overtime ($/hr) – Subcontracting costs ($/hr or $/unit) – Cost of changing capacity – hiring or layoff ($/worker), adding or
capacity, production, subcontracting, inventory, stockouts, and pricing over a specified time horizon
– goal is to maximize profit – decisions made at a product family (not SKU) level – time frame of 3 to 18 months – how can a firm best use the facilities it has?
reducing machine capacity ($/machine)
• Labor/machine hours required per unit • Inventory holding cost ($/unit/period) • Stockout or backlog cost ($/unit/period) • Constraints – overtime, layoffs, capital available,
• Specify the planning horizon (typically 3-18 months) • Specify the duration of each period • Specify key information required to develop an
aggregate plan
第八章供应链的综合计划
Role of Aggregate Planning in a Supply Chain
• Capacity has a cost and lead times are often long • Aggregate planning:
– process by which a company determines levels of
3. Describe the information needed to produce an aggregate plan.
4. Explain the basic trade-offs to consider when creating an aggregate plan.
5. Formulate and solve basic aggregate planning problems using Microsoft Excel.
第八章供应链的综合计划
Role of Aggregate Planning in a Supply Chain
பைடு நூலகம்
• Specify operational parameters over the time
horizon
– Production rate
– Subcontracting
– Workforce
performance
第八章供应链的综合计划
The Aggregate Planning Problem
• Given the demand forecast for each period in the
planning horizon, determine the production level, inventory level, and the capacity level for each period that maximizes the firm’s (supply chain’s) profit over the planning horizon
– Backlog
– Overtime
– Inventory on hand
– Machine capacity level
• All supply chain stages should work together on
an aggregate plan that will optimize supply chain
2020/12/12
第八章供应链的综合计划
Learning Objectives
1. Identify the decisions that are best solved by aggregate planning.
2. Understand the importance of aggregate planning as a supply chain activity.
stockouts, backlogs, from suppliers
第八章供应链的综合计划
Outputs of Aggregate Plan
•Production quantity from regular time, overtime,
and subcontracted time
•Inventory held •Backlog/stockout quantity •Machine capacity increase/decrease •A poor aggregate plan can result in lost sales,
lost profits, excess inventory, or excess capacity
第八章供应链的综合计划
Identifying Aggregate Units of Production
• Aggregate unit should be identified in a
第八章供应链的综合计划
Information Needed for an Aggregate Plan
• Aggregate demand forecast Ft for each Period t over T
periods
• Production costs
– Labor costs, regular time ($/hr) and overtime ($/hr) – Subcontracting costs ($/hr or $/unit) – Cost of changing capacity – hiring or layoff ($/worker), adding or
capacity, production, subcontracting, inventory, stockouts, and pricing over a specified time horizon
– goal is to maximize profit – decisions made at a product family (not SKU) level – time frame of 3 to 18 months – how can a firm best use the facilities it has?
reducing machine capacity ($/machine)
• Labor/machine hours required per unit • Inventory holding cost ($/unit/period) • Stockout or backlog cost ($/unit/period) • Constraints – overtime, layoffs, capital available,
• Specify the planning horizon (typically 3-18 months) • Specify the duration of each period • Specify key information required to develop an
aggregate plan
第八章供应链的综合计划
Role of Aggregate Planning in a Supply Chain
• Capacity has a cost and lead times are often long • Aggregate planning:
– process by which a company determines levels of
3. Describe the information needed to produce an aggregate plan.
4. Explain the basic trade-offs to consider when creating an aggregate plan.
5. Formulate and solve basic aggregate planning problems using Microsoft Excel.
第八章供应链的综合计划
Role of Aggregate Planning in a Supply Chain
பைடு நூலகம்
• Specify operational parameters over the time
horizon
– Production rate
– Subcontracting
– Workforce
performance
第八章供应链的综合计划
The Aggregate Planning Problem
• Given the demand forecast for each period in the
planning horizon, determine the production level, inventory level, and the capacity level for each period that maximizes the firm’s (supply chain’s) profit over the planning horizon
– Backlog
– Overtime
– Inventory on hand
– Machine capacity level
• All supply chain stages should work together on
an aggregate plan that will optimize supply chain