# BLDI Pressure Gauge Model Classification Tool

A VBA-based Excel tool for classifying pressure gauge model codes into product categories.

## Features

- **Automatic Classification**: Classifies model codes into 9 product categories
- **High Performance**: Uses bulk array operations for fast processing (1000+ records in seconds)
- **Priority-Based Logic**: Implements a decision funnel classification system
- **Comprehensive Testing**: Includes full test suite with PRD validation

## Categories (Priority Order)

1. **喷涂产品** (Spray-coated) - Highest priority
2. **卫生型隔膜表** (Sanitary diaphragm)
3. **隔膜表** (Diaphragm)
4. **差压表** (Differential pressure)
5. **膜盒压力表** (Capsule)
6. **精密压力表** (Precision)
7. **电接点压力表** (Electric contact)
8. **常规表** (Regular)
9. **其他** (Other) - Default

## File Structure

```
VBA/
├── ClassModules/
│   └── GaugeClassifier.cls     # Core classification logic
└── Modules/
    ├── MainModule.bas           # Excel I/O interface
    └── TestModule.bas           # Test suite
```

## Installation

### Method 1: Import VBA Files (Recommended)

1. Open your Excel workbook
2. Press `Alt + F11` to open VBA Editor
3. In the VBA Editor:
   - Go to **File → Import File**
   - Import `VBA/ClassModules/GaugeClassifier.cls`
   - Import `VBA/Modules/MainModule.bas`
   - Import `VBA/Modules/TestModule.bas`
4. Save your workbook as **Excel Macro-Enabled Workbook (.xlsm)**

### Method 2: Copy Code Manually

1. Open VBA Editor (`Alt + F11`)
2. Insert Class Module: **Insert → Class Module**, name it `GaugeClassifier`
3. Copy contents of `GaugeClassifier.cls` to the class module
4. Insert Standard Module: **Insert → Module**
5. Copy contents of `MainModule.bas` to the module
6. Insert another Standard Module for tests
7. Copy contents of `TestModule.bas` to the test module

## Usage

### Quick Start

1. **Enter model codes** in column A (starting from A2)
   ```
   A              B
   ┌────────────────────────────────────┐
   1 │ 型号代码       │ 产品分类    │
   ├────────────────────────────────────┤
   2 │ PYTH-100.A0...│              │
   3 │ Y-040.Z0.200..│              │
   └────────────────────────────────────┘
   ```

2. **Run classification**:
   - Press `Alt + F8`
   - Select `RunClassification`
   - Click **Run**

3. **View results** in column B

### Alternative Methods

#### Selection-based Classification
1. Select cells containing model codes
2. Run `RunClassificationOnSelection`
3. Results appear in adjacent column

#### Clear Results
- Run `ClearClassifications` to remove classifications

## Testing

### Run All Tests
1. Press `Alt + F11` to open VBA Editor
2. Press `Ctrl + G` to open Immediate Window
3. Run `TestClassifierLogic`
4. View results in Immediate Window

### Individual Test Functions

| Function | Description |
|----------|-------------|
| `TestClassifierLogic()` | Run all PRD test cases (12 tests) |
| `TestParsingMethods()` | Test string parsing methods |
| `TestPerformance()` | Performance benchmark (1000 records) |
| `TestSingleInput()` | Interactive single input test |

## Test Cases

All test cases from the PRD are validated:

| # | Input | Expected |
|---|-------|----------|
| 1 | `PYTH-100.A0.531.M201.M02\|BP-088.2312.M02.0A3\|FBP-251040...` | 喷涂产品 |
| 2 | `PYTH-063.A0.513.M05.U38.F6A.K15.1.1\|BP-058.1509.M05.BB2.F6` | 卫生型隔膜表 |
| 3 | `PYTH-063.A0.513.M05.U38.F6BP.K15.1.1\|BP-058.1509.M05.BB2.F6` | 喷涂产品 |
| 4 | `PYTH-063.A0.513.M201.M09\|BP-058.1509.M09.0A2\|FC-1520...` | 隔膜表 |
| 5 | `PYXHN-100.A0.531.M201.M09.H4\|BP-088.2518.M09.0A3.YXH\|F5...` | 隔膜表 |
| 6 | `YCSH-100.A0.531.M201.M07\|BP-088.2312.M07.0A3.YCS` | 差压表 |
| 7 | `YE-070.A0.204.G144.K21\|BP-058.1509.K21.0A2` | 膜盒压力表 |
| 8 | `YB-120.A0.407.Z144.M23\|BP-110.5250.P60.0A5` | 精密压力表 |
| 9 | `YX-100.A0.200.M204.M16.H4\|BP-098.0088.M16.0A3.YX` | 电接点压力表 |
| 10 | `Y-040.Z0.200.M104.M07\|BP-037.1007.M07.0A2` | 常规表 |
| 11 | `Y-100.BT.200.M204.M12\|BP-098.0088.B17.PA3` | 常规表 |
| 12 | `` (empty) | 其他 |

## Classification Logic

### String Structure
Model code format: `[表头]|[表盘]|[附件]|[法兰隔膜]`

### Parsing Rules

| Component | Description | Example |
|-----------|-------------|---------|
| **Head** | Everything before first `\|` | `PYTH-100.A0.531.M201.M06` |
| **Main Model** | First word before `-` in head | `PYTH` |
| **Flange** | Last section if starts with `F` | `FBP-251040.RF1.049.13...` |

### Classification Rules

1. **Spray-coated (喷涂产品)**
   - Flange ends with `P` OR head contains `F6AP`/`F6BP`

2. **Sanitary Diaphragm (卫生型隔膜表)**
   - Head contains `F6A` or `F6B` (excluding spray variants)

3. **Diaphragm (隔膜表)**
   - Main model starts with `P`

4. **Differential Pressure (差压表)**
   - Main model starts with `YC`

5. **Capsule (膜盒压力表)**
   - Main model starts with `YE`

6. **Precision (精密压力表)**
   - Main model starts with `YB`

7. **Electric Contact (电接点压力表)**
   - Main model starts with `YX`

8. **Regular (常规表)**
   - Main model starts with `Y`

9. **Other (其他)**
   - Everything else (including empty strings)

## Performance

Typical performance on standard hardware:
- **100 records**: ~0.01 seconds
- **1,000 records**: ~0.05 seconds
- **10,000 records**: ~0.5 seconds

Uses bulk array operations (`Value2`) for optimal performance.

## Troubleshooting

### "No data found" error
- Ensure data starts from cell A2
- Check that column A contains model codes

### Runtime error 1004
- Make sure workbook is saved as `.xlsm` (macro-enabled)
- Check macro security settings: **File → Options → Trust Center → Trust Center Settings → Macro Settings**

### Incorrect classifications
- Verify model code format matches expected structure
- Check for extra spaces or special characters
- Run `TestClassifierLogic()` to validate classifier logic

## API Reference

### GaugeClassifier Class

| Method | Description |
|--------|-------------|
| `Classify(modelString) As String` | Main classification entry point |
| `GetHead(fullString) As String` | Extract head section |
| `GetFlange(fullString) As String` | Extract flange section |
| `GetMainModel(headString) As String` | Extract main model prefix |

### MainModule Functions

| Sub | Description |
|-----|-------------|
| `RunClassification()` | Process all data in column A |
| `RunClassificationOnSelection()` | Process selected cells |
| `ClearClassifications()` | Clear results in column B |

## License

Internal tool for BLDI pressure gauge classification.

## Support

For issues or questions, refer to the PRD or contact development team.