MOVE 3 - STEP 1A:   OUTLINING PURPOSES (Why?)
In this step, the writer introduces his/her solution to the problem described in Move 2 by stating the main purpose or aim of the study. Note in the examples below how the verb tense used depends on whether the writer is referring to a physical or abstract concept.
PRESENT TENSE:

The present tense tends to be used when the aims are described in terms of the written product, now held physically in the reader's hands.

(paper, article, thesisPRESENT tense)

The purpose of this paper is to...
The purpose here is to evaluate...

PAST TENSE:

The past tense tends to be used when the aims are described in terms of abstract concepts such as mental enquiry.
 
(study, investigation, experimentPAST tense)

The aim of the present study was to elucidate...
The objective of this research was to quantify...
Our purpose was to describe...

 

Unlike Finnish, Japanese and Korean, English can (and actually prefers to) take an inanimate agent as the grammatical subject of the sentence.

HUMAN AGENT:

In this study, we suggest a 3-step process...
In this letter, we propose a ...algorithm.
In this paper, we attempt to develop a...
In this letter, we provide a novel approach to...
In this paper, we describe novel algorithms for...
In this paper, we present a system for...
In this letter, we analyze the performance of...
In this letter, we present an efficient routing protocol that...

INANIMATE AGENT:

This paper evaluates the effect on...
This paper presents data on...
This study focuses on a strategy for...
The present study tested...
This thesis proposes a formal procedure for...
This paper introduces a novel architecture for...
This research aims to develop a methodology for...