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How to Write Results and Discussion in an Engineering Paper

How to Write Results and Discussion in an Engineering Paper

Results state what happened; Discussion explains what it means. Results are written in the past tense with no references and no interpretation. Discussion compares your findings with earlier work, offers a mechanism, admits the limits and says what follows. Mixing the two is the commonest structural fault reviewers report.

Authors submitting to an engineering journal often find these two sections the hardest, and the difficulty is usually not writing but deciding what belongs where.

The dividing line

ResultsDiscussion
JobWhat happenedWhat it means
TensePastPresent and past
ReferencesNoneYes — that is the point
InterpretationNoYes
SpeculationNoCarefully, and labelled
LimitationsNoYes

The single sentence that gets flagged most often looks like this: “Strength increased with fibre loading, which is consistent with the findings of Kumar et al. [12] and can be attributed to improved stress transfer.” That is a Results sentence carrying a Discussion sentence inside it. Split it.

Writing Results

Three rules cover almost everything:

  1. Report, do not argue. Give the values, the direction and the significance. Explanation comes later.
  2. Point at your figures, do not transcribe them. “Tensile strength rose steadily up to 15 wt% and fell thereafter (Fig. 3)” is better than reading the whole curve out in prose.
  3. Give the numbers that carry the argument. Two or three, with units and significance. Not all twelve.
“Tensile strength increased from 214 ± 6 MPa in the control to 268 ± 8 MPa at 15 wt% fibre loading (25.2%, p < 0.01), then fell to 241 ± 11 MPa at 20 wt% (Fig. 3).”

That sentence does the whole job: direction, magnitude, spread, significance, and a pointer to the figure. Nothing is interpreted and nothing is missing.

Report what did not work, too

In an engineering journal paper, non-significant results, failed conditions and unexpected outliers are still results. Leaving them out makes the paper look tidier and makes it less true, and reviewers who notice a gap in a series will ask.

Be careful with language here. A difference that failed a significance test is not “a trend towards improvement”; it is a difference the data cannot support. That phrasing appears in a lot of submissions and reviewers are alert to it.

Writing Discussion: the five moves

  1. Restate the key finding in one sentence, without repeating the numbers.
  2. Explain the mechanism. Why did it happen? This is the part readers remember and the part that separates a paper from a data dump.
  3. Compare with published work. Where do you agree, where do you differ, and why might that be?
  4. State the limitations. Conditions tested, sample size, what you could not measure.
  5. Say what follows. What should someone do differently, and what should be tested next?

Move 2 is where most Discussion sections are thin. “The improvement may be due to better interfacial bonding” is a placeholder. If you have evidence — a fracture surface, a thermal trace, a model — use it. If you do not, say that the mechanism is not established by these data.

Combining the two sections

This engineering journal allows Results, Discussion and Conclusion to be combined where that reads better, and for some papers it genuinely does — particularly short studies where each result needs its interpretation immediately.

If you combine them, keep the distinction visible inside the paragraph: state the finding with its numbers, then interpret. What fails is a combined section where nobody can tell which sentences are observation and which are inference. A reviewer who cannot separate them will ask you to separate them.

Using figures and tables properly

Show it asWhenWhy
TextTwo or three valuesA sentence is faster to read than a table of three rows
TableExact values matter, or many conditionsPrecision, and easy comparison down a column
FigureA trend, a shape, a relationshipThe eye reads a curve faster than a column
BothAlmost neverThe instructions specifically say not to present the same data twice

That last row is a rule at this journal, not a preference: the same data should not appear in both a table and a graph. Choose the form that carries the point and reference it from the text.

Three Results sections that get comments

The one that reads out the table

“At 5 wt% the value was 228 MPa, at 10 wt% it was 251 MPa, at 15 wt% it was 268 MPa, at 20 wt% it was 241 MPa…” The table already says this. Give the direction, the peak and the significance, and point at the table.

The one with no numbers at all

“Strength improved considerably with fibre loading.” Considerably is not a quantity. Every claim in a Results section should carry a number a reader could check against the figure.

The one that starts arguing

“The improvement confirms that natural fibres are a viable replacement for synthetic reinforcement.” That is a Discussion sentence, and a fairly large claim, sitting in Results where nobody can see the evidence for it yet.

A structure you can reuse

For each major finding, in Discussion:

  1. One sentence: what you found (no numbers, they are in Results)
  2. Two or three sentences: why it happened, with whatever evidence you have
  3. One or two sentences: how it compares with published work
  4. One sentence: what limits this

Repeat for the next finding. Then close the section with the overall limitations and what should be tested next. That shape works for most engineering journal papers and it stops the Discussion drifting into a general essay, which is the other common failure.

Handling a result that contradicts the literature

This worries engineering journal authors more than it should. A contradiction is interesting; hiding it is not. State it plainly, offer the most likely explanation, and say what would settle the question.

“This is lower than the 310 MPa reported by [14] for a similar system. The difference is most likely a consequence of curing schedule: [14] post-cured at 120 °C, against 80 °C here. Testing across a range of post-cure temperatures would establish whether this accounts for the whole gap.”

Three sentences: the difference, a mechanism, and a test. That is a stronger Discussion than any amount of agreement.

Limitations are not a weakness

Authors leave limitations out fearing they invite rejection. The opposite happens. A reviewer who spots an unstated limit assumes you did not notice it; one who reads it stated assumes you understand your own work.

Keep it factual and short: what conditions you tested, how many specimens, what you could not measure, and what that means for how far the conclusion travels. Then narrow the conclusion to match — conclusions running ahead of the data are a common reason engineering journal papers are rejected after review.

One practical habit closes the gap between a good Discussion and a weak one: write the limitations paragraph first, before the rest of the section. It forces you to be honest about how far the data reaches, and everything you then claim is automatically bounded by it. Written last, limitations become an afterthought bolted on to conclusions that were already too wide.

Frequently asked questions

What is the difference between Results and Discussion?

Results state what happened. Discussion explains what it means. Results are in the past tense with no references; Discussion compares your findings with earlier work and therefore cites it.

Can I combine Results and Discussion?

At this journal Results, Discussion and Conclusion may be combined where that reads better. If you combine them, keep the distinction visible within the text — state the finding, then interpret it.

Should I repeat numbers from a table in the text?

No. Point to the trend and the two or three numbers that carry the argument. Repeating a whole table in prose wastes words and makes both harder to read.

What tense should Results be in?

Past tense throughout. You are reporting what happened in an experiment that is over.

How do I discuss a result that contradicts published work?

State it plainly, give the most likely explanation, and say what would settle it. A contradiction reported honestly is publishable; one that is quietly omitted is a problem waiting to be found.

What if a result was not statistically significant?

Report it. Non-significant results are results, and hiding them distorts the record. State the test, the value and the threshold, and be careful not to describe a non-significant difference as a trend.

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Created by Elena Vasquez  •  08 Aug 2026

International Journal of Research in Engineering

International Journal of Research in Engineering

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