+----------------+ +----------------+ +----------------+
| Vendor |1 *| Penawaran |* 1| Kontrak |
|----------------|----------|----------------|----------|----------------|
| id_vendor | | id_penawaran | | id_kontrak |
| nama_vendor | | id_vendor | | id_vendor |
| kontak_vendor | | tanggal | | nomor_kontrak |
| alamat | | detail_item | | tanggal_mulai |
| kategori_id | | harga_unit | | tanggal_akhir |
+----------------+ +----------------+ +----------------+
| |
| |
v v
+----------------+ +----------------+ +-------------------+
| KategoriVendor |1 *| PurchaseOrder |1 *| Pengiriman |
|----------------|----------|----------------|----------|--------------------|
| id_kategori | | id_po | | id_pengiriman |
| nama_kategori | | id_vendor | | id_po |
+----------------+ | tanggal_order | | tanggal_kirim |
| status | | nomor_surat_jalan |
+----------------+ +--------------------+
|
v
+-------------------+
| Penerimaan |
|-------------------|
| id_penerimaan |
| id_pengiriman |
| tanggal_terima |
| hasil_qc |
+-------------------+
|
v
+-------------------+
| EvaluasiVendor |
|-------------------|
| id_evaluasi |
| id_vendor |
| periode |
| skor_kualitas |
| skor_pengiriman |
| skor_komunikasi |
| catatan |
+-------------------+