The writing of descriptions needs special tactics. The aim of a description is to create in the reader's mind a clear picture of a process or a piece of equipment. In writing operating instructions, success can be defined as the machine operating properly or the process producing the correct results. The state of understanding or visualising something is less obvious, and less measurable. There are degrees of understanding, from a vague grasp, through a picture held with difficulty in focus, to a detailed and confident knowledge. Because the aim is neither so easily identifiable nor so clearly defined, descriptions are not as restricted in the choice of structures and tactics as are operating instructions, but we can establish useful basic strategies to guide the writer.
Read the following description, which is taken unaltered from an industrial report:
Granulation Plant to silo delivery system
Product from the Granulation Plant is delivered on to the reversible conveyor on the silo North side. No. 1 bay receives product off boom 4T44, fed by the reversible conveyor moving westward. No. 2 bay receives product off boom 4T43 fed off the reversible conveyor running eastwards. No. 3 bay receives product by setting boom 4T43 in an East-pointing rest position and sending product over it to a series of two conveyors running East and South and so delivering on to the No. 3 bay boom. Thus, No. 2 bay boom has to be used for both silo No. 2 and 3 deliveries.
No. 2 bay boom (4T43) has slewing and luffing and belt