Piecework (noun)

1. Work that is paid for according to the number of pieces produced rather than by the hour.
2. A task or job that is done in pieces.

Origin:

Late 16th century from piece + work.

Examples:

1. A dressmaker who does piecework earns extra money by working from home.
2. He works as a freelance writer and also does piecework for magazines.
3. She got the piecework contract for making the flags.
4. The workers are paid piecework rates for putting the toys together.
5. The project was completed on piecework basis, so everyone was paid according to their productivity.