Planning in production systems

3. Production processes, types of productions

Slovak University of TechnologyFaculty of Material Science and Technology in Trnava

Production processes

are processes which transform inputs to outputs

individual production processes are different from dependency on different characteristic

are organized by different approach

Production in aspect of amount of produced goods:

piece production serial production

short-run productionmedium-run production long-run production

mass production

Types of production

Goods type TPB Qualification Device Machines

Piece production

Complete industrial plan, machinery

Not so detailed but large

High difficult universal

Serial production: short-, medium-, long-

From simple to complex

By higher level of production type, TPB is detailed

By higher level of production type, qualification is lower

By higher level of production type, device is simpler

mass (current) production

Ware of individual necessary, normalized components

Detailed and arduous, prototype, confirmation series

Low Simple Definite- purpose

Organization of production process and current of production

Organization of production process production process (PP) is working on parallel places and in parallel time have to co-ordinate (organize) it.

Organization part of PP

Area part: co-ordination individual factors in area – area

structure (organization of workplaces and material current)

area structure basic element - workplace co-ordination and workplaces grouping is influenced

by specialization of production array

Time part: bilateral co-ordination individual operation PP – time

structure PP (time knot, advance accounting )

Basic workplaces class

by the number of workers on workplace individual group more machinery

by the degree of specialization – workplaces in piece production serial production mass production

by the degree of work technical evaluation hand machine - hand machine automated robotic

Basic factors which influence area production organization general factory communication network buildings character engineering networks type of production in-plant specialization operating equipment technological method of making goods

Type of workplacesco-ordination

technological co-ordination objective co-ordination composite co-ordination stationary co-ordination individuálne usporiadanieindividuálne usporiadanie individual co-ordination

Basic factors which influence time structure of production process length of technological operations charges amount approach delivery of charges pieces approach accession of producing device technological factors workers qualification length of transporting ways speed of operating equipment time of control operations time of breaks level of production management

Continuous producing time- time interval, which elapsed from first operation goods setting to ending last operation and delivery it to store

Production charge- number of pieces, which are non-stop dressed on one workplace with one-shot time uses for constructing this workplace

Transporting length - number of pieces, which are transporting

together from one workplace to other

Executing charge - number of pieces, which are use for doing

i-operation in one step

Production organization increases changes transporting center of production

organization from production process to organization background area and production operating

mathematics models application and models for resolution placement problems

change to higher production types uses organization flexibility of production

process

Factors, which influence organization production forms

- production type - goods character - technology and technique level

Organization production process form Phase form (for short-run production, is here

technological workplace co-ordination) Current form (for long-run and mass production) Group form (serial, short-run production) Cell (star) form (rise by combination phase and

group characteristic) Constructing form (for piece production)

Forms of employment NC

individual group – in real closed group 3-5

machines, in which accomplish close working circle – cells (nest)

production system - integrated production parts from NC machines, production groups designed and technological similar parts