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PERENCANAAN DAN PENGENDALIAN PRODUKSI

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Topik Pembahasan

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I. PLANNING PROCESS

Top Executive

Operation managers sales &

operations planning (S&OP) team

Operations managers,

supervisors

Planning Tasks (Time Horizon) & responsibilities

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Nature Aggegate Planning

A process of balancing resources

forecasted demand

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Nature Aggegate Planning

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Nature Aggegate Planning

The Objective

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Nature Aggegate Planning

MPS

The process of breaking

an aggregate

Plan into greater detail

A timetable that specifies

What is to be made and when

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Method for Aggregate Planning

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Stage of Aggregate Planning

​

Developing the Aggregate Planning

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Evaluating the Aggregate Planning �

Perpective

Measurements

COST

TC

​

Unit cost

​

Inventory levels

CUSTOMER SERVICE LEVEL

Number of back orders

OPERATION

Stability of schedule

​

Equipment utilization

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Labor use

HUMAN RESOURCES

Effect on workforce

​

Employment stability

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Aggregate Plan Examples �

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  • STUDI KASUS

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Permasalahan Rencana Produksi

Masalah :

  • Semakin merencnak produksi makin banyak biaya bb dan tk
  • Rencana produksi terlalu tinggi
  • Realisasi Penjualan rendah
  • Berapa dibutuhkan konsumen sulit ditebak
  • Lebaran tinggi (tingginya brp)
  • Kalo tidak dipersiapkan, opp cost
  • Sudah mengeluarkan biaya yang besar
  • Barang tidak laku
  • Malah keluar beban biaya penyimpanan

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Permasalahan Rencana Produksi

Bagaimana Rencana ideal adalah :

Berapa perkiraan produksi

Yang menghasilkan biaya seminimal mungkin

SOLUSI :

Merencanaan produksi

Seminimal mungkin

Akan mempengaruhi jumlah produksi

Dan biaya yang dikeluarkan

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Garis rata2 produksi Yaitu 50 /hari (kondisi standar/ideal)

yang hrs diantisipasi

Rencana produksi di atas rata2 produksi (over capacity)

Rencana produksi di atas rata2 produksi (under capacity)

Bila berproduksi diatas , maka hrs disimpan krn produksi

berlebihan , yg diproduksi 50

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Demand-Based

Capacity-Based

Aggregate Planning Options

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Mixing Options to Develop Aggregate Planning

Chase Strategy

Level Strategy

Mixed S

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200+200=400

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Total biaya

RP. 105.152

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Rp. 108.450

​

Rp. 105.152

​

Rp. 117.935

​

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MRP

(material requirement planning)

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Time-Phased Product Structure

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MRP STRUCTURE

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Determining Gross Requirements

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Determining Gross Requirements

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Gross Requirements Plan

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Lot Sizing

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Lot Sizing

Lot Sizing

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Lot For Lot

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EOQ Lot Size Example

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POQ Lot Size Example

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Lot Sizing Summary

Lowest cost

Best approach

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Lot Sizing

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Reference