發送短信 : A framework for improving school safety management: Applying lean thinking to a case study in Thailand

 _    _    _    _     _____    _    _     ______  
| |  | || | || | ||  /  ___|| | || | ||  /_____// 
| |/\| || | || | || | // __   | || | ||  `____ `  
|  /\  || | \\_/ || | \\_\ || | \\_/ ||  /___//   
|_// \_||  \____//   \____//   \____//   `__ `    
`-`   `-`   `---`     `---`     `---`    /_//     
                                         `-`