The following terms and
words are given definition and meaning to clearly indicate the common and
consistent interpretation to be placed on them by all persons using the job
descriptions.
1. Adapt
To modify, alter or
change furnished tooling to fit it for a specific need without altering its
basic design.
2. Angle, Compound
The angle between the
two (2) non-coinciding sides of the two (2) oblique angles which are in
different planes and have a vertex and one side in common. (Making a compound angle usually presents a
coordinating tolerance problem since it results from holding two (2) adjoining
component angles within tolerances.
After the compound angle is formed, its measurement with protractor,
square or sine bar is exactly the same as for any other angle and no more
difficult.)
3. Assembly Jigs
Jigs which facilitate
holding and aligning a set of parts or assemblies for fabrication or assembly
operations.
4. Check, Functional
To determine whether a
unit or portion of a system performs the function for which it is intended and,
if not, whether rework or alteration is required. Checks of this nature include checking lines
for leaks, making buzzer, bell or other continuity checks, and checking
response to controls as on landing gear.
5. Check, Operational
To make a complete check
of an entire completed independent system.
(An operational check always takes place on a completely assembled
aircraft, missile, space vehicle or marine craft. Examples:
checking the complete electrical system or hydraulic control system on a
completed aircraft. It implies the
necessity of a thorough knowledge of the shop theory involved.)
6. Composites
Parts made of two (2) or
more distinguishable material components either metal and/or nonmetal processed
under heat and/or pressure to achieve a desired configuration.
7. Contour
(Curvature)
A curved surface having
radii of different lengths all of which lie in parallel planes or the same
plane, such planes being perpendicular to the curved surface, or a curved line
having radii of different lengths all of which are in the same plane. The surface of a cone, a typical airfoil
surface, the curved edge of a profiled plate and the curved layout line guiding
the making of a router block are examples.
Contour surfaces composed of sections of cylinders and edges whose
profile is a section of a circle are excluded since the radii are the same
length.
8. Contour, Compound
(Curvature)
A curved surface having
radii of different lengths which lie in nonparallel planes. Compound curvatures are typical of stretch
press and drop hammer dies. The surface
of a sphere or section thereon would be a regular compound curvature and is
excluded.
9. Curvature, Reverse
(Contour)
Means a compound
curvature that reverses its curvature so that it has both concave and convex
portions.
10. Coordinated
Tolerances, Coordinated Dimensions
These expressions are
used only when exacting tolerances are implied, i.e., exacting
tolerances are to be associated always with "coordinated dimensions,"
"coordinated tolerances" unless modified expressly. It should be understood that the mere
location of a point by two (2) or more reference dimensions does not in itself
mean that the dimensions themselves are coordinated. The following is an example of truly
coordinated dimensions: The precise
dimensions between two (2) holes must be held while at the same time the
precise dimensions locating each of the holes must also be held with respect to
another reference point or line.
11. Data Input
The use of any terminal
or keyboard device to insert information into a computer system.
12. Data Retrieval
The use of any terminal
or keyboard device to obtain information from a computer system.
13. Developmental or
Experimental Parts
Parts intended for use
on an experimental or developmental aircraft, missile, space vehicle or marine
craft, i.e., one of a few aircraft designated as being actually or
potentially subject to major modification or change. These aircraft, missiles, space vehicles, or
marine craft are usually produced singly or in small lots using standard
tooling, improvised tooling, newly constructed production tooling or no
tooling. Use of this term in a job
description does not imply a particular level of difficulty unless such
intention is clearly and specifically indicated.
14. Draw, Deep
The relation of depth of
draw to its other dimensions is such that it is distinguished by custom from
moderate or shallow draw.
15. Drawing Metal
The forming of sheet metal or other material by
pressing it into a die while at the same time retarding movement of the metal
into the die by mechanical holding, as with draw rings.
16. Electronic Systems
Systems utilizing
interrelated devices constructed or working by the methods or principles of
electronics.
17. Experimental Work,
Developmental Work
Experimenting with the
process or operation (assembly and/or fabrication) in order to develop new or
improved methods, or building or making new assemblies and installations where
exercise of a thorough knowledge of shop theory involved is necessary and
further is a recognizably difficult assignment which requires ingenuity to
accomplish the assignment satisfactorily.
It does not include work done by a usual or established process or
operation on a part even when such part is on or will later be used on an
experimental or prototype product.
18. Hand Tools
Hand tools normally used
by the workmen in the performance of their occupation, such as files, rasps,
deburring tools, chisels, saws, hand drills, screwdrivers, wrenches, mallets
and punches.
19. Layout
The actual marking of
locating and reference points and lines on the material, part, tool, fixture,
jig or assembly worked on. (Layout in
itself does not imply a high level of difficulty of skill since it can be a simple
work operation such as measuring a length on a piece of lumber and marking a
line or point at which it is to be sawed, marking lines on pavement with a
chalk line preparatory to painting, or scribing around a furnished template on
flat stock. On the other hand, layout
can be a difficult work operation which requires much skill, knowledge, and
experience to make the necessary computations, part setup, precise measurements
and markings, and interpretation of complex blueprints such as on a complex die
or casting requiring layout to establish locations for coordinated hole
patterns, compound angles and/or irregular curvatures.)
20. Layout of Part
Marking of points and
lines which will determine the exact nature and dimensions of the part after
machining or fabrication operations have been performed. (Layout of this nature is an integral and
necessary step in the fabrication of the part.)
21. Lead
On the part of any
classified employee to delegate as authorized, a portion of his/her allocated
work to employees assigned to work with him/her and pass on sufficient
information to enable those employees to accomplish their work in a manner that
will result in economy, quality and efficiency.
Employees classified on
jobs which include lead responsibilities will:
(a) Make detailed work allocations as instructed
by the supervisor, in conformance with the classifications of employees being
led, but will not make basic work assignments which affect the classification
of employees.
(b) Be responsible for furnishing sufficient and
accurate information to assigned employees.
(c) Interpret information, answer questions,
review, check work and eliminate ordinary difficulties.
(d) Perform the other "Determining Duties and
Responsibilities" specified in assigned classification.
Employees classified on
jobs which include lead responsibilities shall not formally appraise the work
of other employees or make, as a result of solicitation by the supervisor,
recommendations concerning employment, release, transfer, upgrading or disciplinary
action relative to other employees, be directly responsible for the quantity or
quality of work produced by other employees, be responsible for the assignment
of overtime within the shop, be required to take attendance for other than the
purpose of making detailed work allocations, or be responsible for handing out
paychecks.
22. Multi-Dimensional
Measurement Systems
Measurement systems
capable of generating precision coordinate data through the use of
multi-dimensional techniques. These
systems typically utilize optics, lasers, film based or digital
technologies. Examples of current
systems include, but are not limited, to laser trackers, coordinate measuring
machines, photogrammetry and theodolites.
23. Pickup
The performance, out of
usual or normal sequence, of work operations which have been omitted by
intention or of necessity (as part shortage or rushed schedule) or by oversight
(as failure to drill a hole, make a cutout, or install a part). (Pickup work does not of itself establish a
high or higher level of difficulty since work done out of sequence is very
often no more difficult than when done in sequence. Therefore, the level of difficulty is to be
determined from the composite job description and compared with the actual
pickup work in question.)
24. Plan Sequence of
Operations
To devise and develop,
subject to supervisory approval, a method of fabrication, assembly,
installation progression, testing or inspecting, etc., for an employee's given
work assignment whereby subject work will be accomplished in the most
practical, expedient and efficient manner in keeping with quality
standards. It is intended to relate
solely to the employee's work operation and does not encompass the progression
of the work order to or through the department.
25. Production Aids
Devices such as
temporary jigs and fixtures made by the worker to facilitate work operations,
increase production or reduce elements of fatigue or strain. Production aids made into permanent tools
will be checked and identified by tooling organizations.
26. Program
A sequence of
instructions that directs a computer to perform specific operations to achieve
a desired result.
27. Repair
To restore a part or
assembly to its original state or utility after it has been damaged by accident
or by wear. It does not have the same
meaning as "Rework."
28. Rework
To undo and then do over
work previously accomplished in order to correct errors or make it conform to
specifications. (Rework can be simple or
difficult according to its nature and variety, therefore, the level of
difficulty intended is to be determined from the composite job description.)
29. Setup
A broad term which
becomes specific only according to its usage and application to machines and/or
operations concerned. It includes the
various necessary physical work operations or steps (other than layout) which
must be accomplished before actual fabrication can proceed. (Setup of a machine might include securing
material to machine bed at the proper angle for cutting, selecting, aligning
and setting cutting tool setting speeds and feeds, and adjusting coolant
flow.) In most assembly operations,
setup (e.g., positioning parts) is so closely intermingled with fitting
and joining together that setup is not customarily designated as such. This is generally true of operations where
machine operation is not the primary job factor.
30. Shop Practice
The generally accepted
method of performing a basic, common, or usual operation under specific
conditions. It covers the knowledge
which is common to the occupation itself and to most manufacturing shops using
the operation under consideration.
Besides the knowledge and ability to use required hand tools and
equipment, it includes knowledge of general safety practices, conduct, rules of
cleanliness, neatness, good housekeeping and care of equipment. Used in the phrase "shop practices and
procedure," practice need not imply other than practices or methods
learned or acquired at any one shop.
31. Shop Procedure
The way custom and
management require, wish or specify that the work be performed. It includes the organizational and Company
rules, procedures and policies made known to the employee for his/her
information and expected compliance. It
covers or implies having sufficient knowledge of organization, management, and
physical details of the Company to perform satisfactorily the required work in
a generally harmonious manner.
32. Shop Theory
The comprehensive craft
knowledge and special skills associated with the particular trade and related
trades without which advanced work of high quality, quantity and uniformity may
not be performed. A thorough knowledge
of shop theory is considered necessary to accomplish the more difficult and
diversified work of an occupation and includes a real understanding of the
capacities as well as limitations of the machines and skills used in the
trade. It implies a knowledge of
"why" as well as "how" a given task should be done. It is acquired by a combination of
observation, experience and schooling.
33. Software
A collection of
programs, routines, and sub-routines that facilitate the programming and
operation of a computer to include documentation and operational procedures.
34. Tooling, Standard
Those tools or tooling
used on the same or different types of machines or operations, principally in
making a setup for either layout or machining and occasionally for bench or
assembly work and which further are found commonly in nearly all shops and
industries performing similar operations.
(In the machine shop it would include Vee-blocks, parallel bars, angle
plates, chucks, collets, machine vises, a wide variety of clamps, bolts, locks
and wedges. In bench or assembly work it
would include surface plates, table vises, and various common attachments used
on portable and stationary tools to permit holding the work or increasing the
scope of the tool.)