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T/T VS C/T part 1

rayando — Thu, 08 Jul 2010 10:35:11 +0000

At previous we have already learn the basic knowledge about TACT TIME and CYCLE TIME.

Now we will discuss further about how to use T/T and C/T to analyze production line performance

at first , we must have present Cycle Time data of our production line.For example : Total Cycle time of molding process C/T = 25 sec/pc

Time available per day for example = 7 hrs per day

Customer order ,for example 2000 pcs/day, its mean T/T = 12.6 sec/pc

From above data C/T and T/T , what we can conclude about our molding production line ? base on C/T data above, can we meet customer order ?

The answer is : WE CAN MEET CUSTOMER ORDER 200 pcs product per DAY

Because….. our molding capacity need 25 second to produce 1 piece product. Mean while base on customer order, we must produce 12.6 second for 1 piece product. it mean, our molding capacity only 50% than customer order.

If we find condition like above sample, we must immediately take action. The action plan for example :

we must do improvement in our molding process in order that we can reduce cycle time become same with Tact Time

detail improvement plan will be discussed at next posting

TACT TIME

rayando — Sun, 28 Mar 2010 10:29:00 +0000

Tact Time or T/T =

Operation hour per day ÷ Requested quantity per day (Quantity of customer order)

It means “Necessary time for one piece of product makes” for making of quantity of customer’s order in the production period.

Request production quantity per day =

Total production quantity ÷Production period (day)

Ex.) Total order quantity = 100,560 pcs / month

Production period = 22 days

Request total quantity per day = 100,560 pcs÷22 days

= 4,570 pcs/day

T/T =

8 h×60 min×60 sec ÷ 4,570 pcs = 6.3 sec/pc

So, when the one product is made by 6.3 sec, we can deliver of 100,560 pcs of customer’s order in period.

The time of 6.3 sec for making one product is T/T.

CYCLE TIME

rayando — Sun, 14 Mar 2010 10:34:40 +0000

C/T=Time until one product is completed.

Cycle time data show how long a process take a time from starting time until finish, its unit is “second/piece” (sec/pc)

Cycle time usually use as a basic data to calculate process capacity

for example : if cycle time of process A = 10 second per piece, its mean than in 1 hr that process can produce product with quantity = 3600/10 = 360 pieces product per hr

Below is an image to explain cycle time at simple

?Ex.?

One operator operation

Time that an operator completed one product and returned to the original position is C/T.

Below is an image show how to calculate Cycle Time

on the next posting I will share the method how to take cycle time of the process.

5S and 3T in Gemba

rayando — Mon, 01 Mar 2010 09:47:24 +0000

In Toyota production system, 5S and 3T is a basic rule that must be applied in Gemba. Without implementation of 5S and 3T, all improvement activities is become not maximal and even useless

5s are as below :

1.Seiri ( Sort Out )

Make sure that only the necessary item are keep in our production line

2. Seiton (Fix arrangement )

Make sure that all things, supporting tool and other item in our production line are keep at fix and clear place , in order that we can easily take and put them and have no lost time to find them

3. Seisou ( Cleaning )

Make sure that our production line are keep cleaning, no rubbish, dirt , dust etc

4. Seiketsu ( Maintaining)

Make sure that we continue maintain 3s above

5.Shitsuke ( Discipline )

Discipline about any thing in production line is a must

3T are as below

1. Teii ( Where To put )

Decide the location where to put something at our line production

2. Tei hin ( What to put )

Decide, what item need to put

3. Tei Ryo (quantity )

Decide how many quantity of item we put there

Lean Manufacturing At Glance

rayando — Fri, 26 Feb 2010 09:39:10 +0000

All Manufacturer need more Profit from their production line

Lean Manufacturing show the Way How to Reduce Cost and get more profit by identifying , analyzing and eliminating 7 Waste in our production line

7 Waste are :

1. Over Production . Produce more than customer need

2. Waiting Time. some machine or manpower have iddle time, Waiting for job from previous process

3. Long distance transportation of good between process

4. Over Processing. Apply unnecessary process

5. Unnecessary Motion. Manpower do many unnecessary motion at one process

6. Reject Product

7. Over of finish good stock