Chrome (Android)
							
								- Tap the lock icon next to the address bar.
 - Tap Permissions → Notifications.
 - Adjust your preference.
 
							
						 
						
							Chrome (Desktop)
							
								- Click the padlock icon in the address bar.
 - Select Site settings.
 - Find Notifications and adjust your preference.
 
							
						 
					 
				 
				
					
						
							Safari (iOS 16.4+)
							
								- Ensure the site is installed via Add to Home Screen.
 - Open Settings App → Notifications.
 - Find your app name and adjust your preference.
 
							
						 
						
							Safari (macOS)
							
								- Go to Safari → Preferences.
 - Click the Websites tab.
 - Select Notifications in the sidebar.
 - Find this website and adjust your preference.
 
							
						 
					 
				 
				
					
						
							Edge (Android)
							
								- Tap the lock icon next to the address bar.
 - Tap Permissions.
 
	- Find Notifications and adjust your preference.
 
							
						 
						
							Edge (Desktop)
							
								- Click the padlock icon in the address bar.
 - Click Permissions for this site.
 - Find Notifications and adjust your preference.
 
							
						 
					 
				 
				
					
						
							Firefox (Android)
							
								- Go to Settings → Site permissions.
 - Tap Notifications.
 - Find this site in the list and adjust your preference.
 
							
						 
						
							Firefox (Desktop)
							
								- Open Firefox Settings.
 - Search for Notifications.
 - Find this site in the list and adjust your preference.
 
							
						 
					 
				 
			 
		 
	
SPC(Statistical Process Control,统计过程控制)是一种借助数理统计方法,对生产过程进行实时监控的质量管理技术。其核心目的是区分生产过程中的正常波动与异常波动,从而对异常及时预警,确保过程稳定于受控状态。
核心工具:控制图
控制图是SPC的主要工具,通过计算控制限来直观判断过程是否受控。其关键思想是:事前预防而非事后检验。
主要作用:
评估和监控过程的稳定性。
发现异常,及时报警,查找原因并消除。
减少变异,提高过程能力,保证产品质量的一致性。
为持续改进提供数据支持,降低对大量检验的依赖。
本质上,SPC是实现质量控制、降低成本和提升效率的科学方法论。
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