Tester utilization fusion dec 2002_cs tu

Tester Utilization (Fusion, FTF)

Date: Jan.02, 2003

By: CS Tu

Division, Content owner, Date(in numbers), ISO No 2

• Team Leader : C.S.Tu• CSTD : Peace Lin.• Equipment TESEC: J.T.Chiu.• System Group :C.S.Tu

Team members

FTF Fusion Utilization

Division, Content owner, Date(in numbers), ISO No 3

Fusion Utilization Status Item \ Month Nov-02

Working Testers 6.3Non-Schedule Time Meal / Break time+Holiday 0.0 No Order 4.8 Sub Total 4.8Planning Utilization (a) 95.2Unschedule Downtime Maintenance Delay 1.6 Tester repair time 4.5Sub Total 6.1Schedule Downtime PM / Calibration 0.6 Change over time 1.4Sub Total 2.1Engineering time 3.8Standby Time Small stop 3.8 Waiting for material 0.0 Type down related stop 2.8 Handler down related stop 1.9 Handle PM 0.0 Others 3.6Sub Total 12.0Productive Time Production 66.7 Maunal Test 0.1 Tester unstable 4.0 Handler unstable 0.4Sub Total 71.2

Planning Utilization (a) 95.2Operation Utilization (b) 74.8Overall Tester Utilization (a)x(b)71.2

Overall Tester Utilization from Output53.2

Dec-02

8.3

0.018.718.781.3

1.02.33.3

0.31.31.55.2

2.60.04.32.40.03.412.7

51.00.36.40.858.5

81.371.458.5

30.3

2.9%

1.4%

1.2%

1.5%

0.2%

2.4%

(2.8% Sub Total)

0.5%

Division, Content owner, Date(in numbers), ISO No 4

Others27%

Wait for Type0%

Small stop21%

Waiting formaterial

0%

Type downrelated stop

33%

Handle PM0%

Handler downrelated stop

19%

Standby Time Analysis ( Dec-02)

* Standby time in Dec have 12.7% more than in Nov.

-Plan_list is here !

Division, Content owner, Date(in numbers), ISO No 5

System Down Root Causes analysis (Dec-02)

Tester Repair Time have 4.5% in Nov and 2.7% in Dec :

Root Cause:

In Nov Fusion FTF had two testers down because of its VME

power Supply and Lamda power pupply, the VME power

supply (no spare on hand).

Action :

Investigate adding this part to LSI item.(Fixed at WK248)

Engineering time 3.8% in Nov and 5.2% in Dec :

Root cause :

Depend on users .

Division, Content owner, Date(in numbers), ISO No 6

Small Stop Causes analysis (Dec-02)

Small Stop have 3.8% in Nov and 2.6% in Dec

Root causes :

* System problems, handler problems and types problems cause

high small stop .

* In Dec >18% of No order , high idle rate .

Improvement direction :

* Need supports form RM group record down the small down .

* Need Type/System/Eguip to improve their equipments down. .

* Need Operator’s Leader to monitor the small stop.

Division, Content owner, Date(in numbers), ISO No 7

Others Down Root Causes analysis (Dec-02)

“Others “ have 3.5% n Dec lower than 3.6% in Nov and 4.5% in Oct .

Root Causes :

Action:

Investigate histroy in ACS , prevent unnecessary action in reading test program when type /sysem/ equip problems happen.

Others Down Analysis in Nov

機台待升降溫度 (handler Warm up)

11%

等待換Type(WaitforChangeType) 

6%

換Type完成等待生產 (wait for prod after

change type )0%

等待生產 (Wait fordevices for prod)1%

讀程式(Loadprogram)

82%

高壓空氣不足 (Vaccum Problem)0%

Division, Content owner, Date(in numbers), ISO No 8

Type Down Root Causes analysis (Dec-02)

In Dec the Main Types Down% (Dec/2002)

PCF50601ET/N5/S30 31.22%

PCD8012H/E27/4 12.64%

VP40581H4 11.81%

VP40581H7 9.19%

OM6353E/2A3/2 7.38%

OM6353E/2A3/2/M1 5.76%

In Nov the Main Types Down % (Nov/2002)

PCD8012H/E27/4 14.27%

PCF50601ET/N5/S30 14.40%

VP40584B3 12.54%

OM6353E/271/2 8.79%

PCF87750E/F2 8.71%

VP40554-2 8.59%

0.00%

20.00%

40.00%

60.00%

80.00%

100.00%

120.00%

In Oct In Nov In Dec

•In Nov & Dec have different status of type down : (Compared with Type Down.)

Top Three Down In Oct In Nov In DecQA un-pass 56.75% 35.67% 31.66%Low yield 11.25% 19.16% 17.09%All fail 11.25% 16.26% 32.27%Change Type Fail 7.70% 16.14% 18.98%

Division, Content owner, Date(in numbers), ISO No 9

Handler Down Root Causes analysis ( Dec-02) Root Causes Analysis Top Three problems in Handler In Oct In Nov In Dec機台區問題(Handler loaderarea )

31.84% 34.45% 41.91%

機台異常(Index problem)

23.79% 32.69% 19.88%

機台區問題(Hnadler unloaderarea)

26.10% 16.25% 21.64%

* TESEC’s Loader and Un-Loader still are the main problems.

Unstable Handler Analysis

In Oct In Nov In Dec

Handler_id\Problem

PercentageHandler_id\Problem

PercentageHandler_id\Proble

mDown Percentage

3940 14.96% 3952 30.38% 3955 12.84%3955 16.11% 3955 20.80% 3959 11.13%3958 32.62% 3959 17.66% 3976 13.57%3959 15.07% 4303 15.20% 4303 16.90%

*Also found some TESEC are unstable , especially 3955 & 3959 .

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

In Oct In Nov In Dec

(Index機台異常problem)

(Hnadler機台區問題unloader area)

(Handler機台區問題loader area )