【正文】 h, according to specification, during a measurement period. PROPRIETARY 169。s pleted first time through according to specs x 100 Total AIP39。 1988 Thomas Group, Inc. All Rights Reserved. 36 Applicability of Cycle Time Metrics Process Type Low Activity High Activity Static cycle time ? ? Dynamic cycle time ? Modeled cycle time ? PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 34 Modeled Cycle Time ? Applies to long cycle time, low transaction processes, for example: ?Research and development ?Design/Development ?Contracting continued... PROPRIETARY 169。s and Processing Speeds, not just pletions ? Good for high transaction process steps Average AIP39。 onhold portion processed = 300 ? What is the overall order entry cycle time? ? What is the onhold cycle time? ? What is the nonhold order cycle time? PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 32 Group Exercise: Order Entry Cycle Time ? In a given 30 calendarday month, for an order function: ?Total WIP = 600 orders。 1988 Thomas Group, Inc. All Rights Reserved. 30 All data for a one month time period ? On the average, a board requires days to progress through the waiting queues and processes and to exit from the line. Dynamic Cycle Time Example Beginning board inventory 4600 Ending board inventory 3600 Boards out to stock 31500 = .13 (30 days/month) = days Average Work in Process Process Speed = (Beg. Inv. + End. Inv.) / 2 OUTS dCT = = = (4600 + 3600) 2 4100 31500 Month 31500 PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 28 ? Imagine the original tube but with an additional side tube containing heavier red balls which push the white and black balls out of the way. The black ball now exits in seven seconds. Adding priority red balls slows down the black ball. OneSecond Actuator Understanding Dynamic Cycle Time PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 26 Or increase the output rate The black ball exits in one second. OneFifth Second Actuator Understanding Dynamic Cycle Time PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 24 How do you make the black ball e out faster? Understanding Dynamic Cycle Time PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 22 Imagine: Clear Tube Shutter opens once each second OneSecond Actuator Understanding Dynamic Cycle Time PROPRIETARY 169。s In + AIP39。s ?Number at specific time in measurement period ?Average of the number at beginning and end of measurement period ?Average numbers from samples during the measurement period ? Processing Speed ?(AIP39。s Processing Speed PROPRIETARY 169。s (Actions in Process) using historical pletion rates (Processing Speed) ? Processing Speed is a function of barriers and backlog ? AIP39。 1988 Thomas Group, Inc. All Rights Reserved. 19 Data also may be displayed as a frequency distribution. Units Mean = Days Cycle Time — Days Typically Long Tail 10 8 4 6 2 0 10 8 6 4 2 0 Static Cycle Time PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 17 A product test that starts on June 12 and concludes on July 19, has a static cycle time of 37 days. Start June 12 Stop July 19 Static Cycle Time = 37 Days Population of one Static Cycle Time continued... PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 15 2. ―Preparing‖ Time ?Setting up a machine ?Initializing a CAD data base ?Researching the literature ?Thinking ―Where was I?‖ 4. ―Redoing‖ Time ?Changes to specifications ?Order changes ?Reworking defective parts ?Product warranty work 1. ―Waiting‖ Time ?Waiting for parts ?Waiting for a truck ?Waiting for priority ?Waiting in a queue 3. ―Doing‖ Time ? Making parts ? Assembling products ? Testing a hypothesis ? CAD of engineering sketches Cycle Time Has Four Components PROPRIETARY 169。 1988 Thomas Group, Inc. All Rights Reserved. 13 All three metrics are required for key processes to provide balanced improvement! TCT Basic: Critical Process Measures ? Cycle Time ?Static ?Dynamic ?Modeled ? FirstPass Yield (FPY) ? Cost/Productivity PROPRIETARY 169。s B D/D CYCLE TIME B E B 0 10 20 30 40 N J M M J S N J M/M 50 % D/D M/M and D/D FPY Days E 100 150 200 250 300 350 400 N J M M J S N J B M/M CYCLE TIME Drivers *Sales Material + Prof