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When an SDR is not performing: a five lever diagnostic

The short answer

When a sales development rep misses target, the instinct is to coach the calls. That is the fourth thing to check, not the first. Five levers decide an SDR’s output and they should be tested in order: list quality, message to market fit, activity discipline, skill execution, and process friction. The order matters because the first two are usually not the rep’s doing, and coaching someone harder on a bad list makes them more diligent at contacting people who were never going to answer. Most of this can be established inside 72 hours from data you already hold.

Shobhit Gupta, founder of GrowthStack Advisory

By Shobhit Gupta

Founder, GrowthStack Advisory. Ran sales development at Locus, GoComet and Landmark’s Logistiq division, and has since delivered for Easyship, ConvertCart and NuVista AI. LinkedIn.

· 7 min read

Scaling SDRs: why headcount growth kills output. Shobhit Gupta on GrowthStack Advisory on YouTube.

Why the order matters more than the list

Three of the five levers are not the rep. If the list is wrong or the message is not landing, the rep is executing correctly against a broken input, and every hour of coaching makes them more diligent at something that cannot work. A sales pipeline audit runs the same five levers on your own data.

There is a reliable shortcut. Compare the struggling rep against a peer working the same segment with the same message. Where the whole team is flat, it is lever one or two and no individual coaching plan will move it. Where one person is flat inside a healthy team, it is lever three, four or five. That single comparison removes most of the guesswork before any call is reviewed.

Lever 1: is the list worth working

Take fifty accounts from the rep’s current queue and check them by hand against the written ICP. Not the ICP as understood, the ICP as written down.

What normally emerges is that a meaningful share do not qualify at all: wrong size, wrong segment, wrong geography, or no plausible reason to need the product this year. A rep working a list like that will miss target regardless of ability, and their reply rate will look like a skill problem on every dashboard.

Two further checks. Confirm the contact data is accurate rather than merely present, because a valid-looking address at the wrong person converts to nothing. And confirm the accounts are not already being worked by someone else, which happens more often than most teams believe and is demoralising in a specific and lasting way.

If the list fails, stop here. The fix is the ICP framework, not a coaching plan.

Lever 2: is the message landing for anyone

Compare reply rate across the team on the same sequence. If everyone is low, the message is the constraint and the rep is a symptom.

Where it is genuinely individual, the usual cause is personalisation applied to the wrong layer. A rep who opens by referencing a company’s recent funding round is personalising something the buyer does not connect to their own problem. A rep who opens with the operational symptom the buyer lives with daily is personalising the part that matters. Both look personalised in a review.

Before concluding anything from a reply rate difference, check the volume behind it. At cold outbound reply rates, the difference between two reps over a few hundred sends is frequently noise, and the cold email A/B test calculator shows how much volume a real conclusion requires. Sequence structure itself is covered in how to structure a B2B outbound sequence.

Lever 3: activity discipline, which is usually a calendar problem

Only now does the rep’s own execution enter the picture, and the first version of it is not effort but structure.

Look at when the activity happens rather than how much of it there is. The common pattern is a rep whose weekly totals are acceptable but whose work is compressed into two days, with prospecting repeatedly displaced by meetings, admin and follow up. Output falls because outbound rewards consistency, and a contact attempted on three consecutive days is a different experience from four attempts in one afternoon.

The fix is protected blocks in the calendar, defended by the manager, rather than a conversation about commitment. Where totals are genuinely low and the calendar is clear, it becomes a straightforward management conversation, but that is less often the case than dashboards suggest.

Lever 4: skill execution, the one coaching actually fixes

By this point the list is good, the message works for others, and the work is happening consistently. What remains is how the rep handles a live conversation.

Three things are worth listening for, and they fail in this order. Whether the rep asks a question and then stops talking. Whether they respond to the actual objection or to the one they prepared for. And whether they attempt to book a specific time rather than offering to send information.

The most useful signal is not the first attempt but the second. A rep who takes a piece of feedback and visibly applies it in the next call will improve; a rep who repeats the original behaviour after two rounds of specific feedback usually will not, and no amount of further review changes that. That is the same trait the hiring test on how to hire your first SDR is designed to surface before an offer is made, which is why it belongs in the interview rather than in month four.

The review structure itself, including roleplay cadence and one to one format, is on SDR coaching and sales playbooks.

Lever 5: process friction

The last lever is everything between the rep and the work: a CRM that takes six fields to log a call, a sequence that requires manual steps, an approval sitting with a manager, a dialler that drops connections, leads routed to the wrong person.

These are easy to overlook because none of them is anyone’s stated responsibility, and each is individually small. Collectively they can remove a significant fraction of a selling week. The diagnostic question to ask the rep directly is which part of their day they would remove if they could, and the answer is usually specific and immediately fixable.

Routing in particular is worth checking rather than assuming, because a rep can spend a quarter judged on leads that were never delivered to them correctly. That mechanism is covered in inbound lead routing.

When it is not a performance problem

Sometimes all five levers come back clean and the rep still does not improve. That outcome is worth naming plainly rather than extending the plan a third time, because an underperforming rep costs more in unworked accounts than in salary, and the accounts do not come back. Hiring and ramping into a working process is SDR team build.

The more useful lesson usually points upstream. Most of what looks like a performance problem in month four was visible in the hiring process and was not tested for, or was visible in onboarding and was not corrected while it was still cheap to correct.

For the pipeline level version of this investigation, see how to audit a sales pipeline in 72 hours and the metrics that predict revenue.

For structure rather than diagnosis, see hiring your first SDR, scaling an SDR team and SDR coaching and sales playbooks.

Frequently asked questions

My SDR is not hitting quota. Where do I start?+

Not with call coaching. Check five levers in order: list quality, message to market fit, activity discipline, skill execution, and process friction. The first two are usually not the rep's doing, and coaching someone harder on a bad list only makes them more diligent at contacting people who were never going to answer. The fastest shortcut is comparing them against a peer working the same segment with the same message.

How do you tell a rep problem from a system problem?+

Compare the struggling rep against peers working the same segment and sequence. If the whole team is flat, the constraint is the list or the message and no individual coaching plan will move it. If one person is flat inside an otherwise healthy team, the cause is activity discipline, skill or process friction. That single comparison removes most of the guesswork before any call is reviewed.

How long should a diagnostic take?+

About 72 hours, because most of it comes from data you already hold. Checking fifty accounts from the rep's queue against the written ICP, comparing reply rates across the team, and looking at when activity happens rather than how much of it there is can all be done from existing records. Only lever four, skill execution, requires sitting with live calls.

What predicts whether an underperforming SDR will improve?+

Whether they change behaviour after specific feedback. The signal is not the first attempt but the second: a rep who takes a piece of feedback and visibly applies it on the next call will improve, and a rep who repeats the original behaviour after two rounds of specific feedback usually will not. This is coachability, and it is better tested in the interview than discovered in month four.

What is process friction in an SDR team?+

Everything sitting between the rep and the work: a CRM that takes six fields to log a call, a sequence with manual steps, an approval waiting with a manager, a dialler that drops connections, or leads routed to the wrong person. Each is individually small and none is anyone's stated responsibility, which is why they are overlooked, and collectively they can remove a significant fraction of a selling week.

Levers three, four and five all assume somebody is managing the rep weekly. Where nobody is, that gap is the finding, and fractional sales leadership is one way to close it.

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Written with AI assistance from Shobhit Gupta’s notes and client work, then reviewed and edited by Shobhit Gupta on .