"written methods" is correct and usable in written English.
You can use it when referring to a way of doing something through written words such as writing, typing, or marking. For example, "We have implemented several written methods to document our research."
"They need to master addition, subtraction, times tables and division, using quick, reliable written methods.
The study of place-name transfer from one language to another is undertaken by investigating oral and written methods of place-name communication.
For maths, he says there will be "early memorisation of tables, written methods of long division and calculations with fractions".
The process of institutionalization undergone by Buddhist thought at the time and the spread of the Buddhist community across the Indian subcontinent coincided with a transition from oral to written methods of textual transmission and with the rise of monastic debates concerning the doctrine among the various Buddhist schools.
Additionally, written methods on the cleaning and disinfection procedures have been made available for all employees.
The study used a set of methods, which included written methods such as listings and essays, visual methods such as visual stimuli and drawings.
Programmers may write methods for it.
In parallel with advance in theoretical conceptions of writing, methods for studying writing also evolved.
Setting the writeFormat key will set the default output format of all calls to write methods.
He spoke about his writing methods, saying that he never planned anything, just sat down at the typewriter and worked it out on the page.
Students use innovative compositional techniques, focusing on new writing methods rather than on traditional lyrical or narrative concerns.
