How to write a proposal follow-up email in English (B2 upper-intermediate): evidence, its limits and a pilot offer

A strong proposal follow-up answers the reader’s main concern, gives the figures, says what they cannot show and asks for a small pilot with a threshold and a dated decision. A trial “suggests” or “shows”, but rarely “proves”. One past success is “we were able to”, not “we could”. This B2 (upper intermediate) topic is for people who pitch new products, services or internal ideas and need written approval. Ten minutes a day is enough.

Who this is for

Product managers, founders, and sales or partnership leads who pitch a new product or service to a client’s decision-maker.
Anyone who has run a trial or proof of concept and now has to report the results honestly and ask for the next step.
People proposing an internal improvement who need approval from finance, operations or data protection.
Too early: if you can describe features and benefits but conditions and test results still feel hard, start with a B1 feature-and-benefit recommendation with a field-test condition.
Too easy: if you already bound your evidence and negotiate pilots comfortably, move on to a C1 change proposal with calibrated predictions, an audited pilot and expansion conditions.

Open the sample pages

Word cards

potential benefit

an advantage that may result if an idea works as intended

A potential benefit of reusable labels is less packing waste per order.

practical solution

an answer that can be implemented under real operating conditions

A prepaid return envelope made the reusable tag a practical solution for small retailers.

shows

presents a clear finding supported by the stated data

The pilot shows that packing time fell across the three participating retailers.

suggests

indicates a possible conclusion while leaving reasonable uncertainty

The return rate suggests that customers will use a simple prepaid process.

demonstrates

provides a convincing example or test of how effectively something works

The wash test demonstrates that the tag can survive repeated cleaning.

illustrates

uses an example to make a broader point easier to understand

One retailer’s support log illustrates why the backup code matters.

proves

claims that evidence establishes a conclusion decisively; use only when alternatives have genuinely been excluded

A twelve-week pilot does not prove that every international return network will work.

reports

attributes information to a named person, survey, study or document

The warehouse manager reports that new staff learned the reset process in under an hour.

Conversation

Maya Thank you for the time, Owen. First, I’ll give you a brief overview of TraceTile. Then I’ll explain the results relevant to your fulfilment team, and after that I’ll propose a limited pilot.

Maya Basically, TraceTile combines a reusable route tag with a managed return service. Your team scans the order, attaches the tag and receives cleaned tags back for the next cycle.

Maya There are two potential benefits for your operation: less relabelling time and fewer routing errors. In a twelve-week trial covering eighteen thousand parcels, average packing time fell by twenty-two seconds and misroutes fell from 2.8 percent to 1.1 percent.

Maya Paper is cheaper for its first use, whereas TraceTile brings the cost per shipment down through repeated cycles. However, that benefit depends on customers returning at least ninety percent of the tags.

Maya Does that sound clear so far?

Owen The comparison is clear, but can your evidence tell me what will happen in our rural delivery area?

Maya Not yet. The first pilot covered urban customers, so it cannot prove rural performance. That’s why I’m proposing a six-month test with two depots, fifty thousand parcels and return points at carrier lockers.

Owen Could we begin with one depot and add the second only if the return rate stays above ninety percent?

Maya Yes, and we could agree a review after the first ten thousand parcels. If the threshold is met, your second depot will be able to join without a new setup fee.

Owen That limits the initial risk. Send me the measurement plan and data-handling terms, and I’ll review the pilot with procurement on Friday.

Language pattern

present ability: can / be able to

use can most commonly for a present capacity; be able to is possible and useful where can has no form

The current tag can store one active route, and warehouse staff are able to reset it in eight seconds.

general past ability: could

use could for a capacity that existed repeatedly or over a period in the past

The first prototype could survive washing, but it could only store one fixed address.

past perception: could

could is natural with past seeing, hearing, feeling and understanding

During the trial, the engineers could see that the printed code reduced support calls.

one-off past success: was / were able to

use was or were able to when someone tried and succeeded in one specific past situation

After the carrier changed its file format, the team was able to update every tag before the next dispatch.

difficult one-off result: managed to

use managed to to emphasise success after difficulty or effort

Despite a six-hour outage, the warehouse managed to dispatch all urgent orders that evening.

specific past failure: couldn’t / wasn’t able to

either form can describe failure in one particular past attempt

One customer couldn’t scan the chip and wasn’t able to find a return point nearby.

present link and future: have been able to / will be able to

use have been able to for achievement connected to now and be able to after will, may, might, want to or would like to

We have been able to reuse some tags twelve times; next year, clients may be able to return them through carrier lockers.

More practice

Describe the value of an idea

potential benefit

an advantage that may result if an idea works as intended

A potential benefit of reusable labels is less packing waste per order.

practical solution

an answer that can be implemented under real operating conditions

A prepaid return envelope made the reusable tag a practical solution for small retailers.

innovative approach

a new method of dealing with a familiar need or problem

The team took an innovative approach by selling the return cycle as a service rather than selling labels once.

major breakthrough

an important advance that removes a significant barrier

A washable antenna was the major breakthrough that allowed each label to survive repeated use.

Explain concept, technology and viability

key concept

the central principle on which an idea or system depends

The key concept is circulation: the retailer pays for each completed label cycle.

cutting-edge technology

technology using the most advanced methods currently available

The first proposal used cutting-edge technology, but the simpler near-field chip proved more reliable.

commercially viable proposition

an offer capable of operating successfully and generating sustainable revenue

A high return rate could make the prototype a commercially viable proposition.

From an idea to action

come up with

create or think of an idea, answer or plan

The design team came up with a label that folds around different parcel sizes.

set up

start and organise a business, project or system

Maya set up a twelve-week pilot with three online retailers.

carry out

perform a planned activity, test or piece of research

The team carried out wash, scan and drop tests before the pilot.

get round

find a way to avoid or solve an obstacle

A printed backup code got round the problem of older phones without near-field scanning.

take up

accept and respond actively to an offer, idea or challenge

Two warehouse teams took up the challenge of redesigning their packing routine.

Develop the result

bring about

cause a change or situation to happen

The scan-at-return feature brought about a sharp improvement in label recovery.

bring down

reduce a price, cost, rate or level

Using one tag repeatedly brought the cost per shipment down after the sixth cycle.

pay off

produce a worthwhile result after effort, cost or risk

The extra usability testing paid off when packing errors fell during the pilot.

take forward

continue developing an idea, plan or project

The founders want to take the service forward with one regional carrier.

TraceTile: judge the proposition

Maya and Owen examine a reusable smart shipping label concept.

Maya TraceTile is a reusable shipping label and return service for medium-sized online retailers. The team came up with it after one retailer calculated that it discarded more than four hundred thousand paper labels and plastic sleeves a year.

Owen The key concept is a closed cycle. The tag stores the current route, the customer drops it into a prepaid return envelope, and TraceTile cleans, resets and supplies it again.

Maya Early tests ran into a practical problem: some customers could not scan the near-field chip. The engineers got round it by printing a short backup code on the tag.

Owen A twelve-week pilot with three retailers covered eighteen thousand parcels. Ninety-three percent of the tags returned, average packing time fell by twenty-two seconds, and misrouted parcels fell from 2.8 percent to 1.1 percent.

Maya Those results suggest a potential benefit; they do not prove that every retailer will perform equally well. The service also needs enough return points, and the reusable tag costs more than paper at the start.

Owen The pilot has paid off, but commercial viability depends on repeated use. The next proposal is a six-month trial with one regional carrier and two hundred thousand parcels.

Can the product scale?

Owen Could the first TraceTile work with every carrier?

Maya No. It could store only one fixed address, so it was useful for general internal returns but not for changing routes.

Owen What happened when the pilot carrier changed its file format?

Maya The engineers were able to update all eighteen thousand route records before the next dispatch. The incident log shows that no parcel left with an old route.

Owen Have customers been able to return the tags easily?

Maya Ninety-three percent have been returned. That suggests the prepaid process is workable, although it doesn’t prove that the rate will hold in other regions.

Owen Will small retailers be able to connect it to their warehouse software?

Maya During the next pilot, they’ll be able to use a standard connector. We haven’t tested every platform yet, so I can’t claim universal compatibility.

Owen What will convince you that the service is ready?

Maya If two hundred thousand parcels complete the cycle and the return rate stays above ninety percent, we’ll be able to price the service with much more confidence.

Write for the operations director

Maya and Owen review the pilot proposal next to a reusable shipping box and tag.

Subject: TraceTile rural pilot — measurement plan for Friday

Hello Owen,

Thank you for explaining that rural return access is your main concern. TraceTile could reduce relabelling time and routing errors, but our urban trial cannot predict rural performance on its own. Across eighteen thousand pilot parcels, average packing time fell by twenty-two seconds, misroutes fell from 2.8 percent to 1.1 percent, and ninety-three percent of tags returned. These results support a controlled test rather than a full rollout.

I propose starting at your North depot with ten thousand parcels. We will measure return rate, packing time, misroutes and customer support contacts. If at least ninety percent of tags return, the South depot will be able to join without another setup fee. We will also document retention periods and access controls before any customer data is processed.

Could you review the attached measurement and data-handling terms with procurement by Friday? I can revise the pilot scope on Monday.

Regards,

Maya

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Give the benefit with its condition

Figures persuade best when the condition comes with them. Here, a supplier presents a reusable shipping tag: “whereas” contrasts two facts; “however” adds the condition.

Figures: “In a twelve-week trial covering eighteen thousand parcels, misroutes fell from 2.8 percent to 1.1 percent.”
Contrast: “Paper is cheaper for its first use, whereas the reusable tag brings the cost per shipment down through repeated cycles.”
Condition: “However, that benefit depends on customers returning at least ninety percent of the tags.”

Evidence verbs: match the verb to the data

“Proves” says no other explanation is possible, which one trial rarely shows; “reports” says whose claim it is. Discuss: when did you last read a claim stronger than its data?

shows (clear finding): “The pilot shows that packing time fell across the three participating retailers.”
suggests (likely, some doubt): “The return rate suggests that customers will use a simple prepaid process.”
demonstrates (a test showing it works): “The wash test demonstrates that the tag can survive repeated cleaning.”
proves (alternatives ruled out): “A twelve-week pilot does not prove that every return network will work.”
reports (whose claim): “The warehouse manager reports that new staff learned the reset process in under an hour.”

Could, was able to or managed to?

“Could” covers general past ability and past seeing or hearing. For one specific success, use “was able to”, or “managed to” after difficulty; in the negative, “couldn’t” works for both. After will, may or want to, use “be able to”.

“The first prototype could survive washing, but it could only store one fixed address.” (general ability)
“After the carrier changed its file format, the team was able to update every tag before the next dispatch.” (one success)
“Despite a six-hour outage, the warehouse managed to dispatch all urgent orders that evening.” (after difficulty)

Admit the limit, then propose a smaller pilot

Every proposal meets the question “Does your evidence apply to us?” Name the limit, then turn it into a test with a scope, a threshold and a review point.

Listen: where does the pilot start, and when is the review? (One depot; after ten thousand parcels.)

Owen Could we begin with one depot and add the second only if the return rate stays above ninety percent?

Maya Yes, and we could agree a review after the first ten thousand parcels. If the threshold is met, your second depot will be able to join without a new setup fee.

Learn this unit your way

The follow-up email in five moves

Write 150–180 words to one decision-maker and cut features that do not answer their concern. Finance wants cost per shipment first; data protection wants to know what you collect, how long you keep it and who can see it.

Their priority: “Thank you for explaining that rural return access is your main concern.”
Evidence and limit: “These results support a controlled test rather than a full rollout; our urban trial cannot predict rural performance.”
Scope and measures: “I propose starting at your North depot with ten thousand parcels, measuring return rate, packing time and misroutes.”
Threshold and data: “If at least ninety percent of tags return, the South depot will be able to join. We will document retention periods before any customer data is processed.”
Dated request: “Could you review the attached terms with procurement by Friday?”

Common mistakes

These make a proposal sound oversold or careless:

“The trial proves it will work everywhere.” Say “suggests” and name the limit.
“Last week we could fix the scanner problem.” One success: “we were able to fix”.
“The second depot will can join.” Use “will be able to join”.
“The team came up a solution.” Keep “with”: “came up with”.
Ending with “Let me know your thoughts.” Ask for one dated decision.

A 10-minute daily practice routine

Use a real product or idea.

2 minutes: make three claims about it with “shows”, “suggests” and “does not prove”.
3 minutes: tell its story with “could”, “was able to” and “will be able to”.
3 minutes: draft a five-move follow-up for one named reader.
2 minutes: rewrite the opening for a finance or data protection reader.

What comes next

Next: an email explaining what a supplier visit will verify, then a decision memo with a trial review date.

Frequently asked questions

How do you write a follow-up email after a proposal in English?

Open with the reader’s main concern, give the key figures and say what they cannot show. Then propose a pilot with a scope, a threshold and a review date, and ask for one dated decision.

What is the difference between “could” and “was able to”?

“Could” is general past ability: “The prototype could survive washing.” One specific success needs “was able to” or “managed to”: “We were able to update every tag.”

Should I write “the data proves” in a business proposal?

Rarely. “Proves” claims that no other explanation is possible; for trial results, “shows” or “suggests” is more accurate.