ERP Notes

Manufacturing

6 min read

Manufacturing & Production Management in ERP

Bagian ini membahas arsitektur, rekayasa data induk, perencanaan berjenjang, pengendalian lantai pabrik (shop floor control), akuntansi biaya barang dalam proses (WIP), dan integrasi menyeluruh dari domain Manufacturing (Produksi / Pabrikasi) dalam sistem ERP enterprise secara universal dan vendor-agnostic.

Gambaran umum alur proses manufaktur telah diperkenalkan pada Phase 2 — Manufacturing Process. Pada Phase 7 ini, pembahasan diperdalam menjadi manual arsitektur domain pengetahuan tingkat lanjut: bagaimana ERP memodelkan struktur hierarki bahan baku, merencanakan kapasitas mesin dan kebutuhan material, mengontrol eksekusi fisik perakitan, melacak cacat mutu, hingga menghitung harga pokok produksi dan varians akuntansi secara presisi.

Tujuan Pembelajaran

Setelah mempelajari modul Manufacturing ini, pembaca diharapkan mampu:

  1. Memahami perbedaan mendasar antara tipe manufaktur diskrit (Discrete), proses kimia/formula (Process), dan lini kontinu (Repetitive).
  2. Mendesain struktur data induk teknik terpadu antara resep material ( BOM) dan tahapan aktivitas stasiun kerja (Routing and Work Centers).
  3. Menguasai logika komputasi perencanaan kebutuhan material berbasis waktu ( MRP) dan perencanaan kapasitas mesin (Capacity Planning).
  4. Mengendalikan siklus hidup pesanan produksi (Manufacturing Order Lifecycle) mulai dari reservasi bahan, kitting, eksekusi lantai kerja, hingga konfirmasi hasil jadi.
  5. Memahami perlakuan akuntansi biaya manufaktur sesuai standar IAS 2 (Inventories): penyerapan biaya tenaga kerja dan overhead ke akun Barang Dalam Proses (WIP Costing) serta analisis varians produksi (Production Variance).
  6. Mengintegrasikan proses maklon pihak ketiga (Subcontracting) dan gerbang kendali mutu (Quality Control & Rework).

Alur Pembelajaran (Learning Path)

Materi disusun mengikuti perkembangan alur manufaktur dari perancangan hingga pelaporan keuangan:

flowchart TD
    subgraph Track1["Pilar 1: Fondasi & Master Data Teknik"]
        M1["(1) Manufacturing Fundamentals"]
        M2["(2) Product Structure & BOM"]
        M3["(3) Routing & Work Centers"]
    end

    subgraph Track2["Pilar 2: Perencanaan & Perhitungan Kebutuhan"]
        M4["(4) Manufacturing Order Lifecycle"]
        M5["(5) Production Planning & MPS"]
        M6["(6) MRP Logic & Explosion"]
    end

    subgraph Track3["Pilar 3: Eksekusi Lantai Pabrik & Material"]
        M7["(7) Material Availability & Reservation"]
        M8["(8) Shop Floor Control & Execution"]
        M9["(9) Material Consumption & Backflush"]
        M10["(10) Production Output & By-Products"]
    end

    subgraph Track4["Pilar 4: Biaya, Kapasitas & Tata Kelola Mutu"]
        M11["(11) Production Costing & WIP"]
        M12["(12) Capacity Planning & Scheduling"]
        M13["(13) Production Variance & Performance"]
        M14["(14) Subcontracting & External Processing"]
        M15["(15) Quality Control & Rework"]
    end

    subgraph Track5["Pilar 5: Analitik & Arsitektur Terpadu"]
        M16["(16) Manufacturing Reporting & Analytics"]
        M17["(17) Manufacturing Integration Architecture"]
    end

    Track1 --> Track2
    Track2 --> Track3
    Track3 --> Track4
    Track4 --> Track5

Daftar 17 Materi Pembelajaran Manufacturing

1. Fondasi & Master Data Teknik

  1. Manufacturing Fundamentals in ERP
    Definisi manufaktur dalam ERP, tipologi produksi (Discrete, Process, Repetitive), strategi respon permintaan (MTS, MTO, ATO, ETO), serta pemisahan tegas antara Master Data teknik vs Data Transaksional pabrik.

  2. Product Structure and Bill of Materials (BOM)
    Hierarki resep bahan bertingkat (Multi-Level BOM), penomoran level terdalam (Low-Level Coding), scrap factor, masa berlaku versi BOM, perbandingan EBOM vs MBOM, dan konsep Phantom BOM.

  3. Routing and Work Center Architecture
    Dekomposisi tahapan kerja pabrik, parameter Work Center (jam kerja kalender, tarif upah operator, tarif mesin, kapasitas efektif), elemen lead time (setup, run, queue, wait, move), serta variasi operasi serial dan paralel.

2. Perencanaan & Perhitungan Kebutuhan

  1. Manufacturing Order Lifecycle and State Machine
    Siklus hidup pesanan produksi dari Draft, Planned, Scheduled, Released, In-Progress, Completed, hingga Closed, matriks transisi FSM, dan perbandingan metrik rencana vs aktual.

  2. Production Planning and Master Production Scheduling (MPS)
    Perencanaan taktis berjangka menengah, pemisahan independent demand vs dependent demand, zona pembatas waktu (Frozen, Slushy, Liquid Time Fences), aturan ukuran lot (L4L, EOQ, FOQ), dan kisi-kisi kalkulasi MPS.

  3. Material Requirements Planning (MRP)
    Algoritma komputasi kebutuhan bahan berbasis waktu, rumus kebutuhan bersih (Net Requirements), penyesuaian waktu mundur (lead time offsetting), contoh numerik rekonsiliasi BOM berjenjang, dan pesan aksi sistem (expedite/defer).

3. Eksekusi Lantai Pabrik & Manajemen Material

  1. Material Availability and Production Reservation
    Pemeriksaan ketersediaan komponen sebelum rilis pesanan, perbedaan mendasar antara Soft Reservation (komitmen stok bebas) vs Hard Allocation / Kitting (penguncian fisik rak), dan protokol mitigasi kekurangan bahan (shortage).

  2. Shop Floor Control and Work Order Execution
    Operasional stasiun kerja lantai pabrik, pencatatan waktu setup dan waktu proses, pelaporan jam kerja operator (labor booking), pelacakan waktu henti mesin (downtime reason codes), dan perhitungan Yield operasional.

  3. Material Consumption and Backflushing Mechanics
    Dua paradigma konsumsi material: Manual Material Issue riil vs Backflushing otomatis pasca-produksi, jeda waktu pencatatan fisik vs sistem, serta perhitungan varians pemakaian bahan baku (Material Usage Variance).

  4. Production Output, Co-Products, and By-Products
    Spektrum hasil konversi pabrik, perbedaan barang jadi utama vs Co-Products vs By-Products vs Scrap, metode alokasi biaya bersama (Joint Cost Allocation), dan perlakuan scrap normal vs abnormal menurut IAS 2.

4. Biaya, Kapasitas & Tata Kelola Mutu

  1. Production Costing and Work in Process (WIP)
    Akumulasi tiga elemen biaya produksi (Bahan Baku Langsung + Tenaga Kerja Langsung + Overhead Pabrik), penilaian persediaan Barang Dalam Proses (Ending WIP) menggunakan metode unit ekuivalen (EUP), dan alur penjurnalan akuntansi perpetual.

  2. Capacity Planning and Production Scheduling
    Penyeimbangan beban kerja terhadap kapasitas stasiun kerja, model penjadwalan berkapasitas terbatas (Finite Capacity) vs tidak terbatas (Infinite), strategi arah waktu (Forward vs Backward Scheduling), serta Teori Kendala (Theory of Constraints & Bottlenecks).

  3. Production Variance and Operational Performance
    Pembedaan tegas varians akuntansi finansial vs KPI fisik, dekomposisi varians biaya standar (Material Price & Usage, Labor Rate & Efficiency, Overhead), contoh perhitungan matematis lengkap, dan metrik kinerja Overall Equipment Effectiveness (OEE).

  4. Subcontracting and External Processing
    Tata kelola maklon manufaktur, aspek kepemilikan hukum bahan baku di lokasi pihak ketiga (Consignment/Subcontractor Warehouse), pemrosesan operasi eksternal, penggabungan biaya jasa maklon ke barang jadi, dan integrasi modul Purchasing (P2P).

  5. Production Quality Control and Rework Management
    Tiga titik gerbang kendali mutu (Incoming, In-Process, Final QC), laporan ketidaksesuaian (Non-Conformance Report / NCR), alur eksekusi pesanan perbaikan (Rework Order), dan integrasi paspor kualitas dengan ketertelusuran nomor seri produk.

5. Analitik & Arsitektur Terpadu

  1. Manufacturing Reporting and Operational Analytics
    Taksonomi metrik manufaktur (Operasional, Perencanaan, Mutu, Finansial), formula eksplisit OEE, First Pass Yield (FPY), dan WIP Turnover, serta hierarki dasbor lantai pabrik taktis vs eksekutif.

  2. Manufacturing and Production Integration Architecture
    Master sintesis arsitektur manufaktur hulu-ke-hilir, matriks integrasi lintas domain (Sales, Planning, Purchasing, WMS, Accounting), dan penelusuran siklus hidup kanonikal produk Laptop Pro dari pesanan penjualan hingga realisasi laba kotor komersial.

Hubungan Terintegrasi dengan Fase 1–6

flowchart LR
    P1["Phase 1: Fundamentals<br/>(Master Data, SoD, DOA)"] --> P7["Phase 7: Manufacturing<br/>(BOM, Routing, MO, Shop Floor)"]
    P2["Phase 2: Business Processes<br/>(Macro Flow Foundation)"] --> P7
    P4["Phase 4: Sales / O2C<br/>(Customer Orders & Demand)"] --> P7
    P7 --> P5["Phase 5: Purchasing / P2P<br/>(Component Replenishment)"]
    P7 <--> P6["Phase 6: Inventory & WMS<br/>(Material Issue & Staging)"]
    P7 --> P3["Phase 3: Accounting<br/>(WIP, Finished Goods, Variances)"]

Referensi Standar Utama

  • IFRS Foundation: IAS 2: Inventories (Costs of Conversion, Joint Products, and Overhead Allocation).
  • ASCM / APICS: Supply Chain Operations Reference (SCOR) Model: Make Domain, Production Activity Control (PAC), and Detailed Scheduling and Planning (DSP).
  • International Organization for Standardization (ISO): ISO 9001:2015 Quality Management Systems (Clauses 8.5 & 8.7).
  • Academic Authorities:
    • Vollmann, T. E., et al. Manufacturing Planning and Control for Supply Chain Management. McGraw-Hill.
    • Horngren, C. T., et al. Cost Accounting: A Managerial Emphasis. Pearson.
    • Groover, M. P. Fundamentals of Modern Manufacturing: Materials, Processes, and Systems. Wiley.
  • Enterprise Software Documentation:
    • Microsoft Dynamics 365 Supply Chain Management (Production Control & Master Planning).
    • Frappe ERPNext (Manufacturing, Work Order & BOM Architecture).
    • Odoo 17 Enterprise (Manufacturing MRP, Work Centers, and Shop Floor Execution).

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