Six Sigma in Action: Web Application PerformanceMaster Black Belt: Steven Bonacorsi
Six Sigma in Action TEDS Systems PerformanceCustomer Profile - 31,000 active Training & EmployeeDevelopment System (TEDS) users – and potentially every GEMedical Systems employee, contractor, and vendor. Process Capability Analysis for Module 2nd C Process Capability – Before USLBusiness Problem & Impact USL Process Data 4.00000 ST LTAverage web page load time was 5.8 seconds. GEMS Learning Target LSL * * Mean 4.70867Solutions General Manager Pete McCabe requested a 4 sec. Sample N StDev (ST) 0.607092 21average time based on general rules from other web applications, StDev (LT) 0.624410such as the GEMS homepage. Potential (ST) Capability Cp *Measure & Analyze CPU CPL Cpk -0.39 -0.39 *Data Collection: Web page load time was measured. The existing Cpm * 3 4 5 6 7process sigma was less than 1. Overall (LT) Capability Observed Performance Expected ST Performance Expected LT Performance Pp * PPM < LSL * PPM < LSL * PPM < LSL *Root Cause: The JRun server was improperly configured not to PPU PPL -0.38 * PPM > USL PPM Total 904761.90 904761.90 PPM > USL PPM Total 878458.02 878458.02 PPM > USL PPM Total 871799.38 871799.38compile data, which slowed down many processes. Ppk -0.38Improve & Control Process Capability Analysis for Module 2nd CRemoved the Djava.compiler=none setting from JRun server, Process Capability – After USLtaking it out of debug mode and allowing it to run more USL Process Data 4.00000 ST Target * LTefficiently. Load times decreased 3.1 seconds and the sigma LSL * Mean 1.69512increased to greater than 6. To control the process, the TEDS Sample N 52 StDev (ST) 0.276561server was placed under the Topaz monitoring scheme, which StDev (LT) 0.325387sends a text message alert to a pager when the page load Potential (ST) Capabilitytime drops below 4 seconds. Cp CPU 2.78 * CPL *Results/Benefits Cpk Cpm 2.78 * 1.0 1.5 2.0 2.5 3.0 3.5 4.0By decreasing the web page load time of the average TEDS page Overall (LT) Capability Observed Performance Expected ST Performance Expected LT Performanceby 3.1 seconds (making it 47% faster), this frees up over $34K in Pp PPU 2.36 * PPM < LSL PPM > USL 0.00 * PPM < LSL PPM > USL 0.00 * PPM < LSL PPM > USL 0.00 *productivity cost savings per year. Additionally, all page load times PPL Ppk 2.36 * PPM Total 0.00 PPM Total 0.00 PPM Total 0.00average less than 4 seconds, satisfying the main customer CTQ. A savings of over $34,000 per year.