Setting Standard Times to Work Operations

Standard Times

A standard time is allotted to the object, based upon the distance that the object or production aid is moved and the difficulty in moving/handling the object or production aid.

AVIX consists of four standard classes:

Standard Class	Equal to
A	2.23 s
B	1.11 s
C	0.56 s
D	0.28 s

 

Standard Class A

An A consists of a time value equal to 2.23 sec. A procedure of this type is characterized by the fact that the basic movement involves a time-limited degree of difficulty and that the move is longer than 13 cm. The movement should also be able to be made within an arm’s length. The person carrying out the movement should not need to move from their
position.

One definition of "time-limited degree of difficulty" is when the movement (the time for the movement) is increased due to a minor hindrance or problem. Common types of difficulties in these cases are:

Grip problems/re-gripping problems: it can be difficult to get a grip on an object which entails that the normal motion pattern is broken (a motion stop followed by a number of repetitive finger movements).

Attachment problems/adjustment problems: it can be difficult to attach an object which entails that the process takes longer than if assembly is problem-free (a motion stop followed by a number of repetitive finger movements).

Standard Class B

A B consists of a time value equal to 1.11 sec. A B is characterized as a movement which is longer than 13 cm and does not involve any time-limited degree of difficulty. The movement shall take place within an arm’s length distance.

A movement of this type could be taking a tool or object and moving it within arm’s length without hindrance. Actions can consist of placing an object in a position where one can work on it.

If the movement involves a time-limited degree of difficulty, its classification is upgraded to double its value, or an A. If an action is judged to be more time demanding than double the allotted time, the action is divided into two work operations. One operation for the action and one for the difficulty, such as an attachment problem, for instance.

Standard Class C

A C consists of a time value equal to 0.56 sec. A C is characterized as a movement which is less than 13 cm and does not involve any time-limited degree of difficulty. An action of this type can be taking a tool or object and moving it within 13 cm without hindrance or placing an object without difficulty within 13 cm.

If the movement is less than 13 cm, but contains a time limited degree of difficulty, its classification is upgraded to double its value, or a B. If an action is judged to be more time demanding than double the allotted time, the action is divided into two work operations.  One operation for the action and one for the difficulty, such as with an adjustment or fitting problem, for instance.

Standard Class D

A D consists of a time value equal to 0.28 sec. A D is used for very small actions such as inspection of a component or soldering point. One D is allocated per inspected point.

Setting Standard Times for Assembly

Standard Time for Assembly

Assembly is the only activity which can be allotted the color green. The definition of assembly is:

• a value object placed in its final location on the product or another value object

An assembly can never be allocated more green time than an A, or 2.23 seconds. An A in this case is equivalent to a movement longer than 13cm and within an arm’s length with an adjustment (a motion stop with a number of repetitive finger movements). In cases where assembly is allocated more time, the time that exceeds 2.23 sec., or an A, is allocated the color yellow.

Special Cases when Allotting Times

Blind

When a specific action is performed blind, the normal actions for the action shall be calculated and then the time is upgraded and is given double its value. This entails that C becomes B and B becomes A, and one A becomes two As.

If, on the other hand, an action can be performed blind without being time demanding, the time is not updated, such as is the case when a bolt can be tightened without the operator looking at it, for instance.

Actions performed simultaneously

If two actions are carried out simultaneously, they are both analysed separately in separate operations. In the case where one of the motions requires no concentration it is masked, or in other words, allocated no time. One example of this could be pressing two buttons simultaneously. To apply force, however, requires the full attention of the operator and can never be masked.

Painting and brushing

As regards the spreading and brushing of paste or paint, the following apply:

• When the distance is less than 20 cm, C is allocated.
• When the distance is less than 50 cm, B is allocated.
• When the distance is more than 50 cm, A is allocated (within reach of the current position).

Actions performed above head height

For actions carried out above head height, one stretching is allocated per action that the activity requires.

Loading software

Loading software that is crucial to the product’s function is classed as green time in cases where the time does not exceed 2.23 sec. If the machine time is longer, the remaining time is shown as yellow time in AVIX.

Testing

Testing of products is always yellow time, handling. A test time is clocked and given as machine time.

Packing products

The placing of a product or a part of a product in its final place in the box is classified as assembly. A product or an object can only be allocated green time once. In other words, if the product is first placed in a box and then placed in an additional box, only the first placement will be classed as assembly.

Use of force (UOF)

Use of force is allocated to work processes as a time supplement in AVIX.

Objects and actions that require use of force

There are two variables, the weight and size of the object handled, that determine the time supplement (UOF). The weight in the table represents weight per hand.

	Weight < 2kg	Weight up to 5kg	Weight up to 10kg
<= shoulder width		1 UOF	2 UOF
> shoulder width	1 UOF	2 UOF	2 UOF

The table refers to each lift and/or each step that the operator moves with the object.