Introduction

Motivation
Motivate the research (put your research in global context)

Nature & scope of problem
State what has been done/known (summarize relevant literature)
State what has not been done /not known (the gap of knowledge)

Objective
State objective (the point of the research)

Motivation ⇒ objective ⇒ approach

Source:
Grossman, Mike. 2015. Techniques for Writing and Presenting a Scientific Paper. PhD Course Material at Wageningen Graduate Schools, Wageningen University, The Netherlands.

Teunisse, Fulco. 2015. The Essentials of Scientific Writing and Presenting. PhD Course Material at Wageningen Unversity, The Netherlands.

Smakman, Dick. 2015. The Essentials of Scientific Writing and Presenting. PhD Course Material at Wageningen Unversity, The Netherlands.