1 MH Los Arcos - Grupo Industrial La Italiana S.A. de C.V. Nombre Departamento

2 Fase del proyectoFecha de inicioFecha propuesta de finalización Fecha real de finalización Definición01/04/201105/04/2011 Medición05/04/201110/04/2011 Análisis11/04/201118/04/2011 Mejora19/04/201130/04/2011 Control01/05/201113/05/2011 Validación Imagen relacionada con el proyecto Planta: Los Arcos Process Owner: ---------- Proceso: Nombre del proyecto

3 DMCAI  Cuantificar… Imagen relacionada con el proyecto

4 DMCAI  Eliminar…  Garantizar…  Reducir… Imagen relacionada con el proyecto

5 DMCAI Primer paso Segundo paso Tercer paso Cuarto paso yb: costo… yp: paquetes con defectos

6 DMCAI Y C1 = ------------- (MXN) Y B1 = ----------- (PPM) Y B2 = ----------- (USD) Y P1 = ---------------- (m) Y P2 = ----------------- (PPM) Y P3 = ---------------- (PPM) Y B1 : ------ (MXN) Calibration certificate (Destructive Test) Dimensional Report for Gage GO / No GO Y P1 = Push out force (Nw) Y P2 = Burrs presence (PPM) Y P3 = Deformed bushing (PPM) Attribute MSA accepted

7 DMCAI yp1: ------------------ Nivel Sigma: -0.51 DPMO = 696279 PPM

8 DMCAI DescripciónAntesTargetDespués% mejora YC YC1: SDDSDVSV20000 YB YB1: OIDHJSDN1250 YB2: IAJASDOndcjknc125800 YP YP1: JSONJdnc yp11: spaghAvg135> 200 PPM78500004 Sigma0.36 yp12: fideosAvg135> 200 PPM78500004 Sigma0.36 YP2: UIHDCNSDSC Avg135> 200 PPM78500004 Sigma0.36

9 DMCAI Y P1 = Push out force (Nw) Y P2 = Presence of burrs Y P3 = Deformed bushing Causas potenciales: X1 – Non defined welding parameters X2 – Reworked electrodes X3 – Different Method between Shifts X4 – Electrode not parallel X5 – Electrode not perpendicular X6 – Misaligned electrodes X7 – Method to place piece in welder

10 DMCAI X6 Misaligned electrodes (concentricity) Y P3 1 sample-t 6 measurements around electrodes pulled together Ho: the angle at which electrodes are pulled together is 90° Ha: the angle is different to 90° Electrodes are not misaligned Null hypothesis is not rejected

11 DMCAI X1  DOE X2 & X7 verified significant X3, X4, X5, & X6 verified not significant X1  DOE X2 & X7 verified significant X3, X4, X5, & X6 verified not significant

12 DMCAI Very effective, easy to implement, low cost Moderately effective, Moderately easy to implement, Moderate cost Not very effective, Hard to implement, High cost LEGEND Conteractions: X1 – Establish optimal parameters through DOE X2 – Define the useful life of electrodes

13 Análisis por ANOVA, DOE Factorial, Superficie de Respuesta, CDC, etc… DMCAI

14 DMCAI “Welding Parameters Register” form updated. Parameters are audited every 14 days. “Set up sheet” now includes the parameters at which the machine should be working.

15 DMCAI

16 DMCAI DescripciónAntesTargetDespués% mejora YC YC1: SDDSDVSV20000 YB YB1: OIDHJSDN1250 YB2: IAJASDOndcjknc125800 YP YP1: JSONJdnc yp11: spaghAvg135> 200 PPM78500004 Sigma0.36 yp12: fideosAvg135> 200 PPM78500004 Sigma0.36 YP2: UIHDCNSDSC Avg135> 200 PPM78500004 Sigma0.36