Proposal · Calderwood Supply · prepared by Ostrey
Page 1 of 8
Ostrey
Product design and build
Proposal OS-2026-114
7 August 2026
Valid 30 days
Prepared for Calderwood Supply

Rebuilding how your
customers order

A fixed-scope engagement to replace the Calderwood ordering portal, starting with the twelve products that carry most of your reorder volume and the three customer types who place them.

Engagement
$93,500
Fixed fee, configured on page 3
Duration
13 weeks
From kickoff to launch
Commitment
$37,400
Due on signature
Prepared by
Ostrey, product design and build
For
Calderwood Supply, industrial distribution
Page 2 · What we heard

Before we propose anything, here is what you told us

Three conversations, two site walkthroughs and a morning on the counter phone. If any of this is wrong, the scope on the next page is wrong too, so it is worth reading first.

01

Reordering is the whole job, and the portal is built for browsing

Roughly four in five orders are a repeat of something the customer has bought before, but the portal makes them search the catalogue as if they had never seen it. Your counter team has become the workaround.

02

The three customer types do not want the same thing

A contractor ordering from a van, a facilities buyer working to a purchase order, and a maintenance team replenishing stock behave nothing alike. The portal treats all three identically and serves none of them well.

03

Nobody trusts the stock number

Availability shown online does not reliably match the branch, so experienced customers phone to confirm before ordering. That call is the real cost of the current system, and it falls on the same eleven people every day.

"We do not need a prettier catalogue. We need the reorder to take forty seconds and the number on the screen to be true."

Operations lead, Calderwood Supply, second discovery session
Ostrey · Proposal OS-2026-1142
Page 3 · Scope

Configure the engagement

The first three are the engagement. Without them there is no working ordering experience and we would rather not start. Everything below the line is genuinely optional, and the fee, the timeline and the payment schedule on the following pages all follow whatever you choose here.

Fees are fixed for the scope shown, not estimates. Blended rate $195 per hour at standard pace, disclosed for reference only; you are not billed hourly. The compressed option prices the same hours higher because it needs more people at once. 3
Page 4 · Timeline

What happens, and when

Discovery, the design system and the ordering flow run in sequence because each one depends on the last. Migration and analytics run alongside the build rather than extending it. Change the scope on page 3 and this chart redraws.

Kickoff
Week 1
Two days on site, your team and ours in one room.
Design sign-off
Week 5
The point after which layout changes are a change order.
Launch
Week 13
Live to the three customer types, not to everyone at once.
Working weeks. Calderwood shutdown periods are excluded and would extend the calendar, not the fee.4
Page 5 · Investment

What it costs, and when it is due

Total engagement fee
$93,500
1

On signature

40%. Books the team and the calendar slot.

$37,400
2

At design sign-off

30%. Invoiced the week the design is approved.

$28,050
3

On launch

30%. Invoiced when the ordering flow is live.

$28,050

Net 21 days. The fee is fixed for the scope on page 3, so an overrun inside that scope is ours to absorb, not yours. Work outside it is quoted as a change order before anything is built, never afterwards.

Optional after launch. A support and iteration retainer at $4,500 a month, minimum six months. That buys roughly three days of combined design and engineering time each month, which is enough to keep shipping small improvements and not enough to build anything new. It is not included in any figure above and can be decided after launch.

All figures in US dollars, exclusive of applicable taxes.5
Page 6 · How we work

A small team, in the open, every week

1

One demo every Thursday

Working software, not a status deck. If there is nothing to show on a Thursday, that is the most useful thing you will learn all week and you will learn it from us first.

2

Your people in the room, not in a review cycle

Two of your counter staff join design sessions. They are the ones who currently absorb the failure, and they will spot in ten minutes what a review cycle takes three weeks to surface.

3

We hand over something you can run

The design system, the component library and the deployment pipeline are yours, documented, in your repository, from week three. Not at the end, and not conditional on a retainer.

IR

Ines Rowe

Principal, design

Leads the engagement. Nine years on B2B ordering and trade counter systems.

DA

Diego Alvarez

Engineering lead

Builds the flow and owns the handover. Previously on a distributor platform serving 400 branches.

FK

Farida Khan

Design system

Builds the component library. Part-time from week two, full-time weeks three to five.

Named team, not a pitch team. Substitutions require your written agreement.6
Page 7 · Assumptions, exclusions and terms

The part most proposals bury

Every fixed fee rests on assumptions. Ours are written down here rather than discovered in week six, because a fixed price built on unstated assumptions is not a fixed price.

What we are assuming

  • One named decision-maker at Calderwood with authority to approve design.
  • Feedback within three business days at each review point.
  • Current product and pricing data is exportable in a structured format.
  • Read access to the existing stock system through an API or a nightly export.
  • Two counter staff available for four design sessions of two hours.
  • Your infrastructure team available for two half-days at deployment.

What is not included

  • Product copywriting, photography and any content production.
  • Third-party licence and hosting fees, which are contracted in your name.
  • Changes to the ERP or stock system itself, beyond reading from it.
  • Native mobile applications. The build is responsive web.
  • Migration of order history older than 24 months.
  • Ongoing maintenance after launch, unless the retainer is taken.

Terms in short

Fixed fee for the scope on page 3. Net 21 days. Either party may end the engagement with 15 business days notice, with work completed to that point invoiced pro rata and all work product handed over regardless. Intellectual property in everything we make for you transfers to Calderwood Supply on final payment. We keep the right to describe the work publicly, with your approval on anything specific.

This proposal is valid for 30 days from 7 August 2026.7
Page 8 · Next step

If this is right, start it here

Accepting below records the exact configuration you chose on page 3 and sends it to your Ostrey lead. It is not a contract and it does not commit you to payment; it tells us to prepare the agreement against these numbers rather than a different set.

Scope
3 of 7 modules
Fee
$93,500
Duration
13 weeks

If it is not right, the thing to tell us is which of the three assumptions on page 2 we got wrong. That is almost always where a proposal misses, and it is a twenty minute conversation rather than a new document.

Ostrey · Proposal OS-2026-114 · Calderwood Supply8
Fee
$93,500
Duration
13 weeks
Due on signature
$37,400